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<title>21 February, 2021</title>
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<title>Covid-19 Sentry</title><meta content="width=device-width, initial-scale=1.0" name="viewport"/><link href="styles/simple.css" rel="stylesheet"/><link href="../styles/simple.css" rel="stylesheet"/><link href="https://unpkg.com/aos@2.3.1/dist/aos.css" rel="stylesheet"/><script src="https://unpkg.com/aos@2.3.1/dist/aos.js"></script></head>
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<h1 data-aos="fade-down" id="covid-19-sentry">Covid-19 Sentry</h1>
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<h1 data-aos="fade-right" data-aos-anchor-placement="top-bottom" id="contents">Contents</h1>
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<li><a href="#from-preprints">From Preprints</a></li>
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<li><a href="#from-clinical-trials">From Clinical Trials</a></li>
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<li><a href="#from-pubmed">From PubMed</a></li>
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<li><a href="#from-patent-search">From Patent Search</a></li>
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<h1 data-aos="fade-right" id="from-preprints">From Preprints</h1>
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<li><strong>International risk of the new variant COVID-19 importations originating in the United Kingdom</strong> -
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A fast-spreading SARS-CoV-2 variant identified in the United Kingdom in December 2020 has raised international alarm. We estimate that, in 16 out of 19 countries analyzed, there is at least a 50% chance the variant was imported by travelers from the United Kingdom by December 7th.
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🖺 Full Text HTML: <a href="https://www.medrxiv.org/content/10.1101/2021.01.09.21249384v4" target="_blank">International risk of the new variant COVID-19 importations originating in the United Kingdom</a>
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<li><strong>Exhaled SARS-CoV-2 quantified by face-mask sampling in hospitalised patients with covid-19</strong> -
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Background Human to human transmission of SARS-CoV-2 is driven by the respiratory route but little is known about the pattern and quantity of virus output from exhaled breath. We have previously shown that face-mask sampling (FMS) can detect exhaled tubercle bacilli and have adapted its use to quantify exhaled SARS-CoV-2 RNA in patients admitted to hospital with covid-19. Methods Between May and December 2020, we took two concomitant FMS and nasopharyngeal samples (NPS) over two days, starting within 24 hours of a routine virus positive NPS in patients hospitalised with covid-19, at University Hospitals of Leicester NHS Trust, UK. Participants were asked to wear a modified duckbilled facemask for 30 minutes, followed by a nasopharyngeal swab. Demographic, clinical, and radiological data, as well as International Severe Acute Respiratory and emerging Infections Consortium (ISARIC) mortality and deterioration scores were obtained. Exposed masks were processed by removal, dissolution and analysis of sampling matrix strips fixed within the mask by RT-qPCR. Viral genome copy numbers were determined and results classified as Negative; Low: less than or equal to 999 copies; Medium: 1,000-99,999 copies and High 100,000 or more copies per strip for FMS or per 100microlitres for NPS. Results 102 FMS and NPS were collected from 66 routinely positive patients; median age: 61 (IQR 49 - 77), of which FMS was positive in 37% of individuals and concomitant NPS was positive in 50%. Positive FMS viral loads varied over five orders of magnitude (<10-3.3 x 106 genome copies/strip); 21 (32%) patients were asymptomatic at the time of sampling. High FMS viral load was associated with respiratory symptoms at time of sampling and shorter interval between sampling and symptom onset (FMS High: median (IQR) 2 days (2-3) vs FMS Negative: 7 days (7-10), p=0.002). On multivariable linear regression analysis, higher FMS viral loads were associated with higher ISARIC mortality (Medium FMS vs Negative FMS gave an adjusted coefficient of 15.7, 95% CI 3.7-27.7, p=0.01) and deterioration scores (High FMS vs Negative FMS gave an adjusted coefficient of 37.6, 95% CI 14.0 to 61.3, p=0.002), while NPS viral loads showed no significant association. Conclusion We demonstrate a simple and effective method for detecting and quantifying exhaled SARS-CoV-2 in hospitalised patients with covid-19. Higher FMS viral loads were more likely to be associated with developing severe disease compared to NPS viral loads. Similar to NPS, FMS viral load was highest in early disease and in those with active respiratory symptoms, highlighting the potential role of FMS in understanding infectivity.
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🖺 Full Text HTML: <a href="https://www.medrxiv.org/content/10.1101/2020.08.18.20176693v2" target="_blank">Exhaled SARS-CoV-2 quantified by face-mask sampling in hospitalised patients with covid-19</a>
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<li><strong>Evaluation of sampling frequency and normalization of SARS-CoV-2 wastewater concentrations for capturing COVID-19 burdens in the community</strong> -
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Wastewater surveillance for SARS-CoV-2 provides an approach for assessing the infection burden across a city. For these data to be useful for public health, measurement variability and the relationship to case data need to be established. We measured SARS-CoV-2 RNA concentrations in the influent of twelve wastewater treatment plants from August 2020 to January 2021. Replicate samples demonstrated that N1 gene target concentrations varied by 21% RSD between technical replicate filters and by 14% RSD between duplicate assays. COVID-19 cases were correlated significantly (rho≥0.70) to wastewater SARS-CoV-2 RNA concentrations for seven plants, including large and small cities. SARS-CoV-2 data normalized to flow improved correlations to reported COVID-19 cases for some plants but normalizing to a spiked recovery control (BCoV) or a fecal marker (PMMoV or HF183) generally reduced correlations. High frequency sampling demonstrated that a minimum of two samples collected per week was needed to maintain accuracy in trend analysis. We found a significantly different ratio of COVID-19 cases to SARS-CoV-2 loads in one of three large communities, suggesting a higher rate of undiagnosed cases. These data demonstrate that SARS-CoV-2 wastewater surveillance can provide a useful community-wide metric to assess the course of the COVID-19 pandemic.
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🖺 Full Text HTML: <a href="https://www.medrxiv.org/content/10.1101/2021.02.17.21251867v2" target="_blank">Evaluation of sampling frequency and normalization of SARS-CoV-2 wastewater concentrations for capturing COVID-19 burdens in the community</a>
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<li><strong>Vaccination strategies for minimizing loss of life in Covid-19 in a Europe lacking vaccines</strong> -
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Aim and Background: We aimed at identifying vaccination strategies that minimize loss of life in the Covid-19 pandemic. Covid-19 mainly kills the elderly, but the pandemic is driven by social contacts that are more frequent in the young. Vaccines elicit stronger immune responses per dose in younger persons. As vaccine production is a bottleneck, many countries have adopted a strategy of first vaccinating the elderly and vulnerable, while postponing vaccination of the young. Methods: Based on published age-stratified immunogenicity data of the Moderna mRNA-1273 vaccine, we compared the established ′one dose fits all′ approach with tailored strategies: The known differential immunogenicity of vaccine doses in different age groups is exploited to vaccinate the elderly at full dose, while the young receive a reduced dose, amplifying the number of individuals receiving the vaccine early. A modeling approach at European Union scale with population structure, Covid-19 case and death rates similar to Europe in late January 2021 is used. Results: When the elderly were vaccinated preferentially, the pandemic initially continued essentially unchecked, as it was dominantly driven by social contacts in other age groups. Tailored strategies, including regular dosing in the elderly but reduced dose vaccination in the young, multiplied early vaccination counts, and even with some loss in protection degree for the individual person, the protective effect towards stopping the pandemic and protecting lives was enhanced, even for the elderly. In the European Union, pandemic duration (threshold >100′000 cases/day) was shortened from 53 to 18-24 days; cumulative death count over 100 days was reduced by >30′000. Conclusion: Protecting the vulnerable, minimizing overall deaths and stopping the pandemic is best achieved by an adaptive vaccination strategy using an age-tailored vaccine dose, in this model parameterized to European demographics, coronavirus transmission observations and vaccine characteristics.
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🖺 Full Text HTML: <a href="https://www.medrxiv.org/content/10.1101/2021.01.29.21250747v5" target="_blank">Vaccination strategies for minimizing loss of life in Covid-19 in a Europe lacking vaccines</a>
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<li><strong>Encephalopathies associated with severe COVID-19 present specific neurovascular unit alterations without evidence of strong neuroinflammation</strong> -
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Objective: Coronavirus disease (COVID-19) has been associated with a large variety of neurological disorders. However the mechanisms underlying these neurological complications remain elusive. In this study we aimed at determining whether neurological symptoms were caused by SARS-CoV-2 direct infection or by either systemic or local pro-inflammatory mediators. Methods: We checked for SARS-CoV-2 RNA by RT-qPCR, SARS-CoV-2-specific antibodies and for 49 cytokines/chemokines/growth factors (by Luminex) in the cerebrospinal fluids (CSF) +/- sera of a cohort of 22 COVID-19 patients with neurological presentation and 55 neurological control patients (inflammatory [IND], non-inflammatory [NIND], multiple sclerosis [MS]). Results: We detected SARS-CoV-2 RNA and virus-specific antibodies in the CSF of 0/22 and 10/21 COVID-19 patients, respectively. Of the four categories of tested patients, the CSF of IND exhibited the highest level of cytokines, chemokines and growth factors. In contrast, COVID-19 patients did not present overall upregulation of inflammatory mediators in the CSF. However, the CSF of patients with severe COVID-19 (ICU patients) exhibited higher concentrations of CCL2, CXCL8, and VEGF-A in the CSF than patients with a milder form of COVID-19. In addition, we could show that intrathecal CXCL8 synthesis was linked to an elevated barrier index and correlated to the increase of peripheral inflammation (serum HGF and CXCL10). Conclusion: Our results point at an absence of massive SARS-CoV-2 infection or inflammation of the central nervous system, but highlight a specific impairment of the neurovascular unit linked to intrathecal production of CXCL8.
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🖺 Full Text HTML: <a href="https://www.medrxiv.org/content/10.1101/2020.11.01.20217497v2" target="_blank">Encephalopathies associated with severe COVID-19 present specific neurovascular unit alterations without evidence of strong neuroinflammation</a>
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<li><strong>The Mean Unfulfilled Lifespan (MUL): A New Indicator of the Impact of Mortality Shocks on the Individual Lifespan</strong> -
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Declines in period life expectancy at birth (PLEB) provide intuitive indicators of the impact of a cause of death on the individual lifespan. Derived under the assumption that future mortality conditions will remain indefinitely those observed during a reference period, however, the intuitive interpretation of a PLEB becomes problematic when that period conditions reflect a temporary mortality shock, resulting from a natural disaster or the diffusion of a new epidemic in the population for instance. Rather than to make assumptions about future mortality, I propose measuring the difference between a period average age at death and the average expected age at death of the same individuals (death cohort): the Mean Unfulfilled Lifespan (MUL). For fine-grained tracking of the mortality impact of an epidemic, I also provide an empirical shortcut to MUL estimation for small areas or short periods. For illustration, quarterly MUL values in 2020 are derived from estimates of COVID-19 deaths in 159 national populations and 122 sub-national populations in Italy, Mexico, Spain and the US. The highest quarterly values in national populations are obtained for Ecuador (5.12 years, second quarter) and Peru (4.56 years, third quarter) and, in sub-national populations, for New York (5.52 years), New Jersey (5.56 years, second quarter) and Baja California (5.19 years, fourth quarter). Using a seven-day rolling window, the empirical shortcut suggests the MUL peaked at 9.12 years in Madrid, 9.20 years in New York, and 9.15 years in Baja California, and in Guayas (Ecuador) it even reached 12.6 years for the entire month of April. Based on reported COVID-19 deaths that might substantially underestimate overall mortality change in affected populations, these results nonetheless illustrate how the MUL tracks the mortality impact of the pandemic, or any mortality shock, retaining the intuitive metric of differences in PLEB, without their problematic underlying assumptions.
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🖺 Full Text HTML: <a href="https://www.medrxiv.org/content/10.1101/2020.08.09.20171264v4" target="_blank">The Mean Unfulfilled Lifespan (MUL): A New Indicator of the Impact of Mortality Shocks on the Individual Lifespan</a>
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<li><strong>A Multiscale Multicellular Spatiotemporal Model of Local Influenza Infection and Immune Response</strong> -
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Respiratory viral infections pose a serious public health concern, from mild seasonal influenza to pandemics like those of SARS-CoV-2. Spatiotemporal dynamics of viral infection impact nearly all aspects of the progression of a viral infection, like the dependence of viral replication rates on the type of cell and pathogen, the strength of the immune response and localization of infection. Mathematical modeling is often used to describe respiratory viral infections and the immune response to them using ordinary differential equation (ODE) models. However, ODE models neglect spatially-resolved biophysical mechanisms like lesion shape and the details of viral transport, and so cannot model spatial effects of a viral infection and immune response. In this work, we develop a multiscale, multicellular spatiotemporal model of influenza infection and immune response by combining non-spatial ODE modeling and spatial, cell-based modeling. We employ cellularization, a recently developed method for generating spatial, cell-based, stochastic models from non-spatial ODE models, to generate much of our model from a calibrated ODE model that describes infection, death and recovery of susceptible cells and innate and adaptive responses during influenza infection, and develop models of cell migration and other mechanisms not explicitly described by the ODE model. We determine new model parameters to generate agreement between the spatial and original ODE models under certain conditions, where simulation replicas using our model serve as microconfigurations of the ODE model, and compare results between the models to investigate the nature of viral exposure and impact of heterogeneous infection on the time-evolution of the viral infection. We found that using spatially homogeneous initial exposure conditions consistently with those employed during calibration of the ODE model generates far less severe infection, and that local exposure to virus must be multiple orders of magnitude greater than a uniformly applied exposure to all available susceptible cells. This strongly suggests a prominent role of localization of exposure in influenza A infection. We propose that the particularities of the microenvironment to which a virus is introduced plays a dominant role in disease onset and progression, and that spatially resolved models like ours may be important to better understand and more reliably predict future health states based on susceptibility of potential lesion sites using spatially resolved patient data of the state of an infection. We can readily integrate the immune response components of our model into other modeling and simulation frameworks of viral infection dynamics that do detailed modeling of other mechanisms like viral internalization and intracellular viral replication dynamics, which are not explicitly represented in the ODE model. We can also combine our model with available experimental data and modeling of exposure scenarios and spatiotemporal aspects of mechanisms like mucociliary clearance that are only implicitly described by the ODE model, which would significantly improve the ability of our model to present spatially resolved predictions about the progression of influenza infection and immune response.
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🖺 Full Text HTML: <a href="https://www.biorxiv.org/content/10.1101/2021.02.20.432089v1" target="_blank">A Multiscale Multicellular Spatiotemporal Model of Local Influenza Infection and Immune Response</a>
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<li><strong>Preprints in motion: tracking changes between posting and journal publication</strong> -
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Amidst the COVID-19 pandemic, preprints in the biomedical sciences are being posted and accessed at unprecedented rates, drawing widespread attention from the general public, press and policymakers for the first time. This phenomenon has sharpened longstanding questions about the reliability of information shared prior to journal peer review. Does the information shared in preprints typically withstand the scrutiny of peer review, or are conclusions likely to change in the version of record? We assessed preprints that had been posted and subsequently published in a journal between 1st January and 30th April 2020, representing the initial phase of the pandemic response. We utilised a combination of automatic and manual annotations to quantify how an article changed between the preprinted and published version. We found that the total number of figure panels and tables changed little between preprint and published articles. Moreover, the conclusions of 6% of non-COVID-19-related and 15% of COVID-19-related abstracts undergo a discrete change by the time of publication, but the majority of these changes do not reverse the main message of the paper.
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🖺 Full Text HTML: <a href="https://www.biorxiv.org/content/10.1101/2021.02.20.432090v1" target="_blank">Preprints in motion: tracking changes between posting and journal publication</a>
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<li><strong>KLF2 is a therapeutic target for COVID-19 induced endothelial dysfunction</strong> -
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Coronavirus disease 2019 (COVID-19) is regarded as an endothelial disease (endothelialitis) with its mechanism being incompletely understood. Emerging evidence has demonstrated that the endothelium represents the Achilles’ heel in COVID-19 patients and that endothelial dysfunction precipitates COVID-19 and accompanying multi-organ injuries. Thus, pharmacotherapies targeting endothelial dysfunction have potential to ameliorate COVID-19 and its cardiovascular complications. Primary human umbilical vein endothelial cells (HUVECs) and human pulmonary microvascular endothelial cells (HPMECs) were treated with serum from control subjects or COVID-19 patients. Downstream monocyte adhesion and associated gene/protein expression was evaluated in endothelial cells exposed to COVID-19 patient serum in the presence of KLF2 activator (Atorvastatin) or KLF2 overexpression by an adenoviral vector. Here, we demonstrate that the expression of KLF2 was significantly reduced and monocyte adhesion was increased in endothelial cells treated with COVID-19 patient serum due to elevated levels of pro-adhesive molecules, ICAM1 and VCAM1. IL-1{beta} and TNF-, two cytokines observed in cytokine release syndrome in COVID-19 patients, decreased KLF2 gene expression. Next-generation RNA-sequencing data showed that atorvastatin treatment leads to a cardiovascular protective transcriptome associated with improved endothelial function (vasodilation, anti-inflammation, antioxidant status, anti-thrombosis/-coagulation, anti-fibrosis and reduced angiogenesis). Treatment of HPMECs with atorvastatin or KLF2 adenovirus ameliorate COVID-19 serum-induced increase in endothelial inflammation and monocyte adhesion by increasing KLF2 expression. Altogether, the present study demonstrates that genetic and pharmacological activation of KLF2 represses COVID-19 associated endothelial dysfunction, heralding a potentially new direction to treat endothelialitis accompanying COVID-19.
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🖺 Full Text HTML: <a href="https://www.biorxiv.org/content/10.1101/2021.02.20.432085v1" target="_blank">KLF2 is a therapeutic target for COVID-19 induced endothelial dysfunction</a>
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<li><strong>Knowledge, attitudes and perceptions towards COVID-19 vaccinations: a cross-sectional community survey in Bangladesh</strong> -
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Background: Several vaccines have been approved against coronavirus disease (COVID-19) and distributed globally in different regions. However, general community knowledge, attitudes and perceptions towards COVID-19 vaccinations are poorly understood. Thus, the study aimed to investigate community knowledge, attitudes and perceptions towards COVID-19 vaccinations in Bangladesh. Methods: An exploratory and anonymous population-based e-survey was conducted among 1658 general individuals (55.6% male; mean age=23.17±6.05 years; age range=18-65 years). The survey was conducted using a semi-structured and self-reported questionnaire containing informed consent along with four sections (i.e., socio-demographics, knowledge, attitudes, and perceptions). Multiple linear regression was performed to determine the variables predicting knowledge, and attitudes towards COVID-19 vaccinations. Results: The mean scores of knowledge and attitudes were 2.83±1.48 (out of 5) and 9.34±2.39 (out of 12) respectively. About a quarter of participants thought that the COVID-19 vaccination available in Bangladesh is safe, only 60% will have the vaccination and about two-thirds will recommend it to family and friends. In the multiple regression model, higher SES, having university/ higher levels of education, holding nuclear families and having previous history of essential vaccines uptake were associated with knowledge; whilst attitudes were significantly associated with being female and having previous history of essential vaccines uptake. Just over half of the participants thought that everyone should be vaccinated and 61% responded that health workers should be vaccinated first on priority basis. 95% vaccine should be administered free of charge in Bangladesh and almost 90% believed that the COVID-19 vaccine used in Bangladesh may have side effects. Conclusions: The findings reflect inadequate knowledge but more positive attitudes towards COVID-19 vaccine among the general population in Bangladesh. In order to improve knowledge, immediate health education programs need to be initiated before mass vaccination schedule.
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🖺 Full Text HTML: <a href="https://www.medrxiv.org/content/10.1101/2021.02.16.21251802v2" target="_blank">Knowledge, attitudes and perceptions towards COVID-19 vaccinations: a cross-sectional community survey in Bangladesh</a>
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<li><strong>Statewide Impact of COVID-19 on Social Determinants of Health - A First Look: Findings from the Survey of the Health of Wisconsin</strong> -
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There is an urgent need to track the early and ongoing impact of the COVID-19 pandemic on population health from local to global scales. At the same time, there is an overall lack of U.S. state-specific surveillance data tracking social determinants of health (SDOH) and associations with population well-being, individual mitigation and coping strategies, family dynamics and other economic shocks of the pandemic in populations. Statewide data can offer important insights into how SDOH shape the long-term effects of COVID-19 in the population since implementation of many policies and programs varied widely early on in the pandemic. In May of 2020, the Survey of the Health of Wisconsin (SHOW) program launched a statewide online/phone survey of early and ongoing impacts of COVID-19 on health and well-being across diverse communities and families. The goal of this study is to provide descriptive data including perceived COVID-19 risks, access to and results of COVID-19 antigen testing, individual mitigation and coping strategies, family dynamics and other economic shocks of the pandemic on health and mental health in populations. Key findings include higher rates of testing and perceived past infection from COVID-19 among non-white respondents. Higher economic shifts and job changes in female vs male respondents. Families with children reported overall higher levels of stress, and stress from the pandemic. There were urban and rural differences in changes to access to care. Rural regions, which had a lower prevalence of infections early in the pandemic as compared to urban areas, also reported fewer delays or missed appointments due to COVID-19. Key findings show that SDOH are shaping impacts of health and well-being early on in the pandemic and future longitudinal follow-up will be important to shape policies and programs well into the future.
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🖺 Full Text HTML: <a href="https://www.medrxiv.org/content/10.1101/2021.02.18.21252017v1" target="_blank">Statewide Impact of COVID-19 on Social Determinants of Health - A First Look: Findings from the Survey of the Health of Wisconsin</a>
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<li><strong>The unexpected dynamics of COVID-19 in Manaus, Brazil: Herd immunity versus interventions</strong> -
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The arrival of SARS-COV-2 in late March 2020 in the state of Amazonas, Brazil, captured worldwide attention and concern. The rapid growth of the epidemic, a health system that had collapsed, and mass gravesites for coping with growing numbers of dead, were broadcast by the media around the world. Moreover, a majority of the local Amazonian indigenous communities were physically distant from appropriate medical services, to the point where warnings of genocide were issued. In a recent Science paper (December 2020), Buss et al. reported that some 76% of the residents of the city of Manaus, the capital of Amazonas, had been infected by October 2020. This estimate of the COVID-19 attack rate was based on a seroprevalence analysis of blood donor data, which despite its shortcomings was thought to be a sufficiently reliable proxy of the larger population. An attack rate of this magnitude (76%) implied that herd immunity had already been reached and the community was relatively protected from further infection. Yet in December 2020, a harsh second wave of COVID-19 struck Manaus, and currently appears to be even larger than the first wave. Here we use mathematical modelling of mortality data in Manaus, and in various states of Brazil, to understand why a second wave appeared against all expectations. Our analysis is based on estimating a “flexible” reproductive number R_0 (t) from the mortality data, as it changes in time over the epidemic.
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🖺 Full Text HTML: <a href="https://www.medrxiv.org/content/10.1101/2021.02.18.21251809v2" target="_blank">The unexpected dynamics of COVID-19 in Manaus, Brazil: Herd immunity versus interventions</a>
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<li><strong>In depth analysis of patients with severe SARS-CoV-2 in sub-Saharan Africa demonstrates distinct clinical and immunological profiles</strong> -
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Although the COVID-19 pandemic has left no country untouched there has been limited research to understand clinical and immunological responses in African populations. Here we comprehensively characterise patients hospitalised with suspected or confirmed COVID-19, and healthy community controls. PCR-confirmed COVID-19 participants were more likely to receive dexamethasone and a beta-lactam antibiotic, and survive to hospital discharge than PCR-/IgG+ and PCR-/IgG- participants. PCR-/IgG+ participants exhibited a nasal and systemic cytokine signature analogous to PCR-confirmed COVID-19 participants, but increased propensity for Staphylococcus aureus and Streptococcus pneumoniae colonisation. We did not find evidence that HIV co-infection in COVID-19 participants was associated with mortality or altered cytokine responses. The nasal immune signature in PCR-/IgG+ and PCR-confirmed COVID-19 participants was distinct and predominated by chemokines and neutrophils. In addition, PCR-/IgG+ individuals with high COVID-19 clinical suspicion had inflammatory profiles analogous to PCR-confirmed disease and potentially represent a target population for COVID-19 treatment strategies.
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🖺 Full Text HTML: <a href="https://www.medrxiv.org/content/10.1101/2021.02.15.21251753v2" target="_blank">In depth analysis of patients with severe SARS-CoV-2 in sub-Saharan Africa demonstrates distinct clinical and immunological profiles</a>
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<li><strong>Evaluation of a Commercial Culture-free Neutralization Antibody Detection Kit for Severe Acute Respiratory Syndrome-Related Coronavirus-2 and Comparison with an Anti-RBD ELISA Assay</strong> -
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Background: SARS-CoV-2 surrogate neutralization assays that obviate the need for viral culture offer substantial advantages regarding throughput and cost. The cPass SARS-CoV-2 Neutralization Antibody Detection Kit (Genscript) is the first such commercially available assay, detecting antibodies that block RBD/ACE-2 interaction. We aimed to evaluate cPass to inform its use and assess its added value compared to anti-RBD ELISA assays. Methods: Serum reference panels comprising 205 specimens were used to compare cPass to plaque-reduction neutralization test (PRNT) and a pseudotyped lentiviral neutralization (PLV) assay for detection of neutralizing antibodies. We assessed the correlation of cPass with an ELISA detecting anti-RBD IgG, IgM, and IgA antibodies at a single timepoint and across intervals from onset of symptoms of SARS-CoV-2 infection. Results: Compared to PRNT-50, cPass sensitivity ranged from 77% - 100% and specificity was 95% - 100%. Sensitivity was also high compared to the pseudotyped lentiviral neutralization assay (93% [95%CI 85-97]), but specificity was lower (58% [95%CI 48-67]). Highest agreement between cPass and ELISA was for anti-RBD IgG (r=0.823). Against the pseudotyped lentiviral neutralization assay, anti-RBD IgG sensitivity (99% [95%CI 94-100]) was very similar to that of cPass, but overall specificity was lower (37% [95%CI 28-47]). Against PRNT-50, results of cPass and anti-RBD IgG were nearly identical. Conclusions: The added value of cPass compared to an IgG anti-RBD ELISA was modest.
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🖺 Full Text HTML: <a href="https://www.medrxiv.org/content/10.1101/2021.01.23.21250325v2" target="_blank">Evaluation of a Commercial Culture-free Neutralization Antibody Detection Kit for Severe Acute Respiratory Syndrome-Related Coronavirus-2 and Comparison with an Anti-RBD ELISA Assay</a>
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<li><strong>Gout, rheumatoid arthritis and the risk of death from COVID-19: an analysis of the UK Biobank</strong> -
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Objectives To assess whether gout and / or rheumatoid arthritis (RA) are risk factors for coronavirus disease 19 (COVID-19) diagnosis. To assess whether gout and / or RA are risk factors for death with COVID-19. Methods We used data from the UK Biobank. Multivariable-adjusted logistic regression was employed in the following analyses: Analysis A, to test for association between gout or RA and COVID-19 diagnosis (n=473,139); Analysis B, to test for association between gout or RA and death with COVID-19 in a case-control cohort of people who died or survived with COVID-19 (n=2,059); Analysis C, to test for association with gout or RA and death with COVID-19 in the entire UK Biobank cohort (n=473,139) Results RA, but not gout, associated with COVID-19 diagnosis in analysis A. Neither RA nor gout associated with risk of death in the COVID-19-diagnosed group in analysis B. However RA associated with risk of death related to COVID-19 using the UK Biobank cohort in analysis C independent of comorbidities and other measured risk factors (OR=1.9 [95% CI 1.2 ; 3.0]). Gout was not associated with death related to COVID-19 in the same UK Biobank analysis (OR=1.2 [95% CI 0.8 ; 1.7]). Conclusion Rheumatoid arthritis is a risk factor for death with COVID-19 using the UK Biobank cohort. These findings require replication in larger data sets that also allow inclusion of a wider range of factors.
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🖺 Full Text HTML: <a href="https://www.medrxiv.org/content/10.1101/2020.11.06.20227405v2" target="_blank">Gout, rheumatoid arthritis and the risk of death from COVID-19: an analysis of the UK Biobank</a>
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<h1 data-aos="fade-right" id="from-clinical-trials">From Clinical Trials</h1>
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<li data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><p data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><strong>An Effectiveness Study of the Sinovac’s Adsorbed COVID-19 (Inactivated) Vaccine</strong> - <b>Condition</b>: Covid19<br/><b>Intervention</b>: Biological: Adsorbed COVID-19 (Inactivated) Vaccine<br/><b>Sponsor</b>: Butantan Institute<br/><b>Enrolling by invitation</b></p></li>
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<li data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><p data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><strong>Effect of Prone Position onV/Q Matching in Non-intubated Patients With COVID-19</strong> - <b>Condition</b>: Covid19<br/><b>Intervention</b>: Other: prone position<br/><b>Sponsor</b>: Southeast University, China<br/><b>Not yet recruiting</b></p></li>
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<li data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><p data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><strong>Study of the Kinetics of COVID-19 Antibodies for 24 Months in Patients With Confirmed SARS-CoV-2 Infection</strong> - <b>Conditions</b>: Covid19; SARS-CoV 2<br/><b>Intervention</b>: Other: Sampling by venipuncture<br/><b>Sponsor</b>: Centre Hospitalier Régional d’Orléans<br/><b>Recruiting</b></p></li>
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<li data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><p data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><strong>COVID-19 Convalescent Plasma Therapy</strong> - <b>Conditions</b>: SARS-CoV-2 Infection; COVID-19 Infection<br/><b>Intervention</b>: Biological: Convalescent plasma<br/><b>Sponsors</b>: Angelica Samudio; Consejo Nacional de Ciencias y Tecnología, Paraguay; Ministerio de Salud Pública y Bienestar Social, Paraguay; Centro de información y recursos para el desarrollo, Paraguay<br/><b>Completed</b></p></li>
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<li data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><p data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><strong>Protecting Native Families From COVID-19</strong> - <b>Condition</b>: COVID-19<br/><b>Interventions</b>: Behavioral: Motivational Interviewing; Behavioral: COVID-19 Symptom Monitoring System; Behavioral: Motivational Interviewing and COVID-19 Symptom Monitoring System; Other: Supportive Services<br/><b>Sponsor</b>: Johns Hopkins Bloomberg School of Public Health<br/><b>Not yet recruiting</b></p></li>
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<li data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><p data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><strong>Telerehabilitation in Covid-19 After Hospital Discharge</strong> - <b>Condition</b>: Covid19<br/><b>Interventions</b>: Other: Standard Physiotherapy program; Other: Telerehabilitation<br/><b>Sponsor</b>: Universidad de Granada<br/><b>Not yet recruiting</b></p></li>
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<li data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><p data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><strong>AGILE (Early Phase Platform Trial for COVID-19)</strong> - <b>Condition</b>: Covid19<br/><b>Interventions</b>: Drug: CST-2: EIDD-2801; Drug: CST-2: Placebo<br/><b>Sponsors</b>: University of Liverpool; University of Southampton; Liverpool School of Tropical Medicine; Lancaster University; Liverpool University Hospitals NHS Foundation Trust<br/><b>Recruiting</b></p></li>
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<li data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><p data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><strong>Safety and Immunogenicity Study in Adults of AZD1222 and rAd26-S Administered as Heterologous Prime Boost Regimen for the Prevention of Coronavirus Disease 2019 (COVID-19)</strong> - <b>Condition</b>: Covid19<br/><b>Interventions</b>: Biological: AZD1222; Biological: rAd26-S<br/><b>Sponsors</b>: R-Pharm; AstraZeneca<br/><b>Not yet recruiting</b></p></li>
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<li data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><p data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><strong>Pulmonary Rehabilitation of Patients With a History of COVID-19</strong> - <b>Condition</b>: Covid19<br/><b>Intervention</b>: Procedure: Pulmonary rehabilitation<br/><b>Sponsor</b>: University of Rzeszow<br/><b>Enrolling by invitation</b></p></li>
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<li data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><p data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><strong>A Study to Evaluate the Efficacy and Safety of Prothione™ Capsules for Mild to Moderate Coronavirus Disease 2019 (COVID-19)</strong> - <b>Condition</b>: Coronavirus Disease 2019 (COVID-19)<br/><b>Interventions</b>: Drug: Placebo; Drug: Prothione™ (6g)<br/><b>Sponsor</b>: Prothione, LLC<br/><b>Not yet recruiting</b></p></li>
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<li data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><p data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><strong>Trial Efficacy of Saisei Pharma Dietary Supplements MAF Capsules, 148 mg and M Capsules, 148 mg in Hospitalized COVID-19 Patients</strong> - <b>Condition</b>: Covid19<br/><b>Interventions</b>: Dietary Supplement: MAF capsules 148 mg; Dietary Supplement: M capsules 148 mg; Other: Standard of care<br/><b>Sponsor</b>: Saisei Pharma<br/><b>Active, not recruiting</b></p></li>
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<li data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><p data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><strong>Enriched Heparin Anti COVID-19 Trial</strong> - <b>Condition</b>: Covid19<br/><b>Interventions</b>: Drug: Heparin sodium; Drug: Placebo<br/><b>Sponsor</b>: UPECLIN HC FM Botucatu Unesp<br/><b>Not yet recruiting</b></p></li>
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<li data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><p data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><strong>Community Network-driven COVID-19 Testing of Vulnerable Populations in the Central US</strong> - <b>Condition</b>: Covid19<br/><b>Intervention</b>: Other: Social Network Strategy + COVID-19 messaging<br/><b>Sponsor</b>: University of Chicago<br/><b>Not yet recruiting</b></p></li>
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<li data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><p data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><strong>Impact of Colchicine and Low-dose Naltrexone on COVID-19</strong> - <b>Condition</b>: Covid19<br/><b>Interventions</b>: Drug: Colchicine 0.6 mg; Drug: Naltrexone<br/><b>Sponsors</b>: HealthPartners Institute; Park Nicollet Foundation<br/><b>Enrolling by invitation</b></p></li>
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<li data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><p data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><strong>Efficacy and Safety of Tofacitinib in Patients With COVID-19 Pneumonia</strong> - <b>Condition</b>: COVID-19<br/><b>Intervention</b>: Drug: Tofacitinib<br/><b>Sponsor</b>: I.M. Sechenov First Moscow State Medical University<br/><b>Completed</b></p></li>
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<h1 data-aos="fade-right" id="from-pubmed">From PubMed</h1>
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<li data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><p data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><strong>Safety of disease-modifying treatments in SARS-CoV-2 antibody-positive multiple sclerosis patients</strong> - CONCLUSIONS: Despite the relatively high SARS CoV-2 seroprevalence found in this sample of PwMS, all the positive cases showed either no or only mild COVID-19 symptoms. These reassuring findings indicate a lack of COVID-19 complications in PwMS on DMTs and support the hypothesis that it is safe to maintain ongoing treatment with these drugs in the current setting.</p></li>
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<li data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><p data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><strong>Inflammation control and improvement of cognitive function in COVID-19 infections: is there a role for kynurenine 3-monooxygenase inhibition?</strong> - The novel respiratory virus severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), which causes coronavirus disease 2019 (COVID-19), emerged during late 2019 and spread rapidly across the world. It is now recognised that the nervous system can be affected in COVID-19, with several studies reporting long-term cognitive problems in patients. The metabolic pathway of tryptophan degradation, known as the kynurenine pathway (KP), is significantly activated in patients with COVID-19. KP…</p></li>
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<li data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><p data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><strong>A Review of Persistent Post-COVID Syndrome (PPCS)</strong> - Persistent post-COVID syndrome, also referred to as long COVID, is a pathologic entity, which involves persistent physical, medical, and cognitive sequelae following COVID-19, including persistent immunosuppression as well as pulmonary, cardiac, and vascular fibrosis. Pathologic fibrosis of organs and vasculature leads to increased mortality and severely worsened quality of life. Inhibiting transforming growth factor beta (TGF-β), an immuno- and a fibrosis modulator, may attenuate these…</p></li>
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<li data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><p data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><strong>Screening and evaluation of anti-SARS-CoV-2 components from Ephedra sinica by ACE2/CMC-HPLC-IT-TOF-MS approach</strong> - Traditional Chinese medicines played an important role in the treatment of COVID-19 in 2020. Ephedra sinica, one of the major constituent herbs of multi-component herbal formula, has been widely used to treat COVID-19 in China. However, its active components are still unclear. The objectives of this study are to screen and evaluate active components from the traditional Chinese medicine Ephedra sinica for the treatment of COVID-19. In our study, we established an ACE2/CMC bioaffinity…</p></li>
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<li data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><p data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><strong>SARS-CoV-2 and SARS-CoV spike-mediated cell-cell fusion differ in the requirements for receptor expression and proteolytic activation</strong> - The severe acute respiratory syndrome-related coronavirus 2 (SARS-CoV-2) infects cells through interaction of its spike protein (SARS2-S) with Angiotensin-converting enzyme 2 (ACE2) and activation by proteases, in particular transmembrane protease serine 2 (TMPRSS2). Viruses can also spread through fusion of infected with uninfected cells. We compared the requirements of ACE2 expression, proteolytic activation, and the sensitivity to inhibitors for SARS2-S-mediated and…</p></li>
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<li data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><p data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><strong>Lopinavir/ritonavir: Repurposing an old drug for HIV infection in COVID-19 treatment</strong> - Currently, there is no specific antiviral treatment for COVID-19. However, drugs previously developed to treat other viral infections are being tested to verify if they might also be effective against SARS-CoV-2, the virus that causes COVID-19. Twenty years ago, the F.D.A. approved Lopinavir/ritonavir (LPV/r) to treat HIV infection. LPV and ritonavir were initially purposed to inhibit 3-chymotrypsin-like protease (3CL^(pro)) of SARS-CoV and MERS-CoV and preliminary promising data on its efficacy…</p></li>
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<li data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><p data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><strong>Development of a large volume concentration method for recovery of coronavirus from wastewater</strong> - Levels of severe acute respiratory coronavirus type 2 (SARS CoV 2) RNA in wastewater could act as an effective means to monitor coronavirus disease 2019 (COVID-19) within communities. However, current methods used to detect SARS CoV 2 RNA in wastewater are limited in their ability to process sufficient volumes of source material, inhibiting our ability to assess viral load. Typically, viruses are concentrated from large liquid volumes using two stage concentration, primary and secondary. Here,…</p></li>
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<li data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><p data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><strong>Re(I) Tricarbonyl Complexes as Coordinate Covalent Inhibitors for the SARS-CoV-2 Main Cysteine Protease</strong> - Since its outbreak, the severe acute respiratory syndrome - coronavirus 2 (SARS-CoV-2) has impacted the quality of life and cost hundreds-of-thousands of lives worldwide. Based on its global spread and mortality, there is an urgent need for novel treatments which can combat this disease. To date, the 3-chymotrypsin-like protease (3CLpro), which is also known as the main protease, is considered among the most important pharmacological targets. The vast majority of investigated 3CLpro inhibitors…</p></li>
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<li data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><p data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><strong>Simultaneous Inhibition of SARS-CoV-2 Entry Pathways by Cyclosporine</strong> - The COVID-19 pandemic caused by SARS-CoV-2 represents a global public health emergency. The entry of SARS-CoV-2 into host cells requires the activation of its spike protein by host cell proteases. The serine protease, TMPRSS2, and cysteine proteases, Cathepsins B/L, activate spike protein and enable SARS-CoV-2 entry to the host cell through two completely different and independent pathways. Therefore, inhibiting either TMPRSS2 or cathepsin B/L may not sufficiently block the virus entry. We here…</p></li>
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<li data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><p data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><strong>Advances of Inorganic Materials in the Detection and Therapeutic Uses Against Coronaviruses</strong> - Coronaviruses (CoVs) are enveloped viruses with particle-like characteristics and a diameter of 60-140 nm, positively charged, and single-stranded RNA genomes which produce a major outbreak of human fatal pneumonia since the beginning of the 21st century. COVID-19 is currently considered as a continuous potential pandemic threat across the globe. Therefore, considerable efforts have been made to develop innovative methods and technologies for suppressing the spread of viruses as well as…</p></li>
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<li data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><p data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><strong>SARS-CoV-2 M(pro) inhibitors with antiviral activity in a transgenic mouse model</strong> - The COVID-19 pandemic caused by the SARS-CoV-2 virus continually poses serious threats to global public health. The main protease (M^(pro)) of SARS-CoV-2 plays a central role in viral replication. We designed and synthesized 32 new bicycloproline-containing M^(pro) inhibitors derived from either Boceprevir or Telaprevir, both of which are approved antivirals. All compounds inhibited SARS-CoV-2 M^(pro) activity in vitro with IC(50) values ranging from 7.6 to 748.5 nM. The co-crystal structure of…</p></li>
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<li data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><p data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><strong>3D culture models to study SARS-CoV-2 infectivity and antiviral candidates: From spheroids to bioprinting</strong> - The pandemic caused by Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) is receiving worldwide attention, due to the severity of the disease (COVID-19) that resulted in more than a million global deaths so far. The urgent need for vaccines and antiviral drugs is mobilizing the scientific community to develop strategies for studying the mechanisms of SARS-CoV-2 infection, replication kinetics, pathogenesis, host-virus interaction, and infection inhibition. In this work, we review the…</p></li>
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<li data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><p data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><strong>Phyto-compounds from a rather poisonous plant, Strychnos nux-vomica, show high potency against SARS-CoV-2 RNA-dependent RNA polymerase</strong> - CONCLUSION: Sharing the same binding location as that of ATP and having high binding affinities, Ergotamine, Isosungucine, Sungucine and Strychnine N-oxide could be effective in controlling the SARS-CoV-2 virus replication by blocking the ATP and inhibiting the enzyme function.</p></li>
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<li data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><p data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><strong>The COVID-Kidney Controversy: Can SARS-CoV-2 Cause Direct Renal Infection?</strong> - Determining whether SARS-CoV-2 causes direct infection of the kidneys is challenging due to limitations in imaging and molecular tools. Subject of Review: A growing number of conflicting kidney biopsy and autopsy reports highlight this controversial issue. Second Opinion: Based on the collective evidence, therapies that improve hemodynamic stability and oxygenation, or dampen complement activation, are likely to ameliorate acute kidney injury in COVID-19. At this time, whether inhibition of…</p></li>
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<li data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><p data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><strong>Angiotensin-converting enzyme 2, coronavirus disease 2019 and abdominal aortic aneurysms</strong> - CONCLUSION: COVID-19 may theoretically influence AAA disease through multiple SARS-CoV-2-induced mechanisms. Further investigation and clinical follow-up will be necessary to determine whether and to what extent the COVID-19 pandemic will influence the prevalence, progression and lethality of AAA disease in the coming decade.</p></li>
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<h1 data-aos="fade-right" id="from-patent-search">From Patent Search</h1>
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<li><p data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><strong>SARS-COV-2 BINDING PROTEINS</strong> - - <a href="https://patentscope.wipo.int/search/en/detail.jsf?docId=AU318004130">link</a></p></li>
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<li><p data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><strong>Compositions and methods for detecting SARS-CoV-2 spike protein</strong> - - <a href="https://patentscope.wipo.int/search/en/detail.jsf?docId=AU317343760">link</a></p></li>
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<li><p data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><strong>SELF-CLEANING AND GERM-KILLING REVOLVING PUBLIC TOILET FOR COVID 19</strong> - - <a href="https://patentscope.wipo.int/search/en/detail.jsf?docId=AU318003558">link</a></p></li>
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<li><p data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><strong>Deep Learning Based System for the Detection of COVID-19 Infections</strong> - - <a href="https://patentscope.wipo.int/search/en/detail.jsf?docId=AU318003547">link</a></p></li>
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<li><p data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><strong>新冠病毒疫苗表达抗原蛋白的电化学发光免疫检测试剂盒</strong> - 本发明提供一种新冠病毒疫苗表达抗原蛋白的电化学发光免疫检测试剂盒，所述试剂盒至少包含：包被有链霉亲和素的孔板、生物素标记的抗新冠棘突蛋白抗体1、SULFO标记的抗新冠棘突蛋白抗体2、洗涤液、读数液、新冠病毒S蛋白标准品和新冠病毒RBD蛋白标准品。本发明以生物素标记的抗新冠棘突蛋白的抗体1与链霉亲和素板进行连接作为固定相，以新冠S蛋白、RBD蛋白作为参照品，可被SULFO标记的抗体2识别，从而检测新冠抗原的表达情况。该试剂盒能准确灵敏地定量检测不同基质中的新冠S蛋白、RBD蛋白，样品的前处理过程简单，耗时少，可同时检测大量样品。本发明对于大批量样品的新冠病毒疫苗表达抗原的检测具有重要意义。 - <a href="https://patentscope.wipo.int/search/en/detail.jsf?docId=CN317672956">link</a></p></li>
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<li><p data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><strong>陶瓷复合涂料、杀毒陶瓷复合涂料及其制备方法和涂层</strong> - 本发明是关于一种陶瓷复合涂料、杀毒陶瓷复合涂料及其制备方法和涂层。该涂料包括30<sub>99.9%无机树脂、0.1</sub>70%氮化硅、0<sub>10%功能助剂、0</sub>18%无机颜料和0<sub>2%其他功能助剂；无机树脂由有机烷氧基硅烷、有机溶剂和硅溶胶混合、反应，抽醇，添加去离子水获得；有机烷氧基硅烷、有机溶剂和硅溶胶的质量比为1</sub>1.6：0.5~0.8：1。所要解决的技术问题是如何制备一种贮存稳定性好、可常温固化且膜层的物理化学性能优异的涂料；该涂料VOC含量低，具有良好的安全生产性，且涂料成膜过程中的VOC排放很低，利于环保；该膜层的硬度高、柔韧性好，不易开裂，且可以接触性杀灭病毒和细菌；该涂料既可常温固化，也可加热固化，无需现场两个剂型调配，施工方便，成本节约，从而更加适于实用。 - <a href="https://patentscope.wipo.int/search/en/detail.jsf?docId=CN317672744">link</a></p></li>
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<li><p data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><strong>SARS-CoV-2 antibodies</strong> - - <a href="https://patentscope.wipo.int/search/en/detail.jsf?docId=AU315792577">link</a></p></li>
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<li><p data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><strong>利用BLI技术检测新型冠状病毒中和性抗体的方法</strong> - 本发明提供一种利用BLI技术检测新型冠状病毒中和性抗体的方法，先将同一浓度的人ACE2蛋白捕获到生物传感器表面上，再将新型冠状病毒棘突蛋白RBD分别与不同浓度的待测中和性抗体预混，再将各混合液分别与捕获到生物传感器表面上的人ACE2蛋白接触，根据基于BLI技术的分子互作仪器检测到的干涉光谱的相对位移强度变化计算抑制率，绘制抑制曲线，计算IC50。本发明操作简单，快速高效，检测全过程无需包被和反复加样、洗板，15min内即可得到实验结果。检测反应在黑色孔板中进行，可实现大批量样品的新冠中和抗体的检测，与传统定性检测不同，通过计算IC50值，可以快速比较不同新冠中和性抗体的抑制能力。 - <a href="https://patentscope.wipo.int/search/en/detail.jsf?docId=CN317346970">link</a></p></li>
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<li><p data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><strong>SARS-CoV-2 antibodies</strong> - - <a href="https://patentscope.wipo.int/search/en/detail.jsf?docId=AU315792579">link</a></p></li>
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<li><p data-aos="fade-left" data-aos-anchor-placement="bottom-bottom"><strong>能够抑制冠状病毒Spike蛋白与ACE2相互作用的化合物的用途</strong> - 本发明公开了能够抑制冠状病毒Spike蛋白与ACE2相互作用的化合物的用途。结构如下，该类化合物在制备治疗和/或预防SARS‑CoV‑2新型冠状病毒感染的药物中的用途。同时，化合物不仅能够抑制冠状病毒Spike蛋白与ACE2蛋白的相互作用，IC50<1μM，同时能够促使Spike‑ACE2复合物的解离。在细胞水平上可以有效的抑制新型冠状病毒SARS‑CoV‑2假病毒入侵，IC50<2μM。所述化合物能特异性的结合在Spike蛋白的RBD区域，KD<6μM，表明该类化合物对于制备治疗和/或预防冠状病毒感染药物具有非常积极的作用。 - <a href="https://patentscope.wipo.int/search/en/detail.jsf?docId=CN317346989">link</a></p></li>
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