Background Real-world data assessing the impact of lockdowns on COVID-19 cases remain limited from resource-limited settings. We examined growth of incident confirmed COVID-19 cases before, during and after lockdowns in Pune, a city in western India with 3.1 million population that reported the largest COVID-19 burden at the peak of the pandemic. Methods Using anonymized individual-level data captured by Pune`s public health surveillance program between February 1st and September 15th 2020, we assessed weekly incident COVID-19 cases, infection rates, and epidemic curves by lockdown status (overall and by sex, age, and population density) and modelled the natural epidemic using the 9-compartmental model INDSCI-SIM. Effect of lockdown on incident cases was assessed using multilevel Poisson regression. We used geospatial mapping to characterize regional spread. Findings Of 241,629 persons tested for SARS-CoV-2, the COVID-19 disease rate was 267.0 (95% CI 265.3,268.8) per 1000 persons. Epidemic curves and geospatial mapping showed delayed peak of the cases by approximately 8 weeks during the lockdowns as compared to modelled natural epidemic. Compared to a subsequent unlocking period, incident COVID-19 cases 43% lower (IRR 0.57, 95% CI 0.53, 0.62) during India`s nationwide lockdown and 22% (IRR 0.78, 95% CI 0.73, 0.84) during Pune`s regional lockdown and was uniform across age groups and population densities. Conclusion Lockdowns slowed the growth of COVID-19 cases in population dense, urban region in India. Additional analysis from rural and semi-rural regions of India and other resource-limited settings are needed.
Swab, quantitative, reverse transcription polymerase chain reaction (RT-qPCR) tests remain the gold standard of diagnostics of SARS-CoV-2 infections. However, these tests are costly and time-consuming, and swabbing limits their throughput. We developed a 3-gene, seminested RT qPCR test with SYBR green-based detection, optimized for testing pooled saliva samples for high-throughput diagnostics of epidemic-affected populations. The proposed two-tier approach depends on decentralized self-collection of saliva samples, pooling, 1st-tier testing with the mentioned highly sensitive screening test and subsequent 2nd-tier testing of individual samples from positive pools with the in vitro diagnostic (IVD) test. The screening test was able to detect 5 copies of the viral genome in 10 μl of isolated RNA with 50% probability and 18.8 copies with 95% probability and reached Ct values that were highly linearly RNA concentration-dependent. In the side-by-side comparison (testing artificial pooled samples), the screening test attained slightly better results than the commercially available IVD-certified RT-qPCR diagnostic test (100% specificity and 89.8% sensitivity vs. 100% and 73.5%, respectively). Testing of 1475 individual clinical samples pooled in 374 pools of 4 revealed 0.8% false positive pools and no false negative pools. In weekly prophylactic testing of 113 people within 6 months, a two-tier testing approach enabled the detection of 18 infected individuals, including several asymptomatic individuals, with a fraction of the costs of individual RT-PCR testing.
Background: The SARS-CoV-2 B.1.1.7 variant which was first identified in the United Kingdom (U.K.) has increased sharply in numbers worldwide and was reported to be more contagious. On January 17, 2021, a COVID-19 clustered outbreak caused by B.1.1.7 variant occurred in a community in Daxing District, Beijing, China. Three weeks prior, another non-variant (lineage B.1.470) COVID-19 outbreak occurred in Shunyi District, Beijing. This study aimed to investigate the clinical features of B.1.1.7 variant infection. Methods: A prospective cohort study was conducted on COVID-19 cases admitted to Ditan hospital since January 2020. Data of 74 COVID-19 cases from two independent COVID-19 outbreaks in Beijing were extracted as study subjects from a Cloud Database established in Ditan hospital, which included 41 Shunyi cases (Shunyi B.1.470 group) and 33 Daxing cases (Daxing B.1.1.7 group) that have been hospitalized since December 25, 2020 and January 17, 2021, respectively. We conducted a comparison of the clinical characteristics, RT-qPCR results and genomic features between the two groups. Findings: Cases from Daxing B.1.1.7 group (15 [45.5%] male; median age, 39 years [range, 30.5, 62.5]) and cases from Shunyi B.1.470 group (25 [61.0%] male; median age, 31 years [range, 27.5, 41.0]) had a statistically significant difference in median age (P =0.014). Seven clinical indicators of Daxing B.1.1.7 group were significantly higher than Shunyi B.1.470 group including patients having fever over 38℃ (14/33 [46.43%] in Daxing B.1.1.7 group vs. 9/41 (21.95%) in Shunyi B.1.470 group [P = 0 .015]), C-reactive protein ([CRP, mg/L], 4.30 [2.45, 12.1] vs. 1.80, [0.85, 4.95], [P = 0.005]), Serum amyloid A ([SAA, mg/L], 21.50 [12.50, 50.70] vs. 12.00 [5.20, 26.95], [P = 0.003]), Creatine Kinase ([CK, U/L]), 110.50 [53.15,152.40] vs. 70.40 [54.35,103.05], [P = 0.040]), D-dimer ([DD, mg/L], 0.31 [0.20, 0.48] vs. 0.24 [0.17,0.31], [P = 0.038]), CD4+ T lymphocyte ([CD4+ T, mg/L], [P = 0.003]) , and Ground-glass opacity (GGO) in lung (15/33 [45.45%] vs. 5/41 [12.20%], [P =0.001]). After adjusting for the age factor, B.1.1.7 variant infection was the risk factor for CRP (P = 0.045, Odds ratio [OR] 2.791, CI [1.025, 0.8610]), SAA (0.011, 5.031, [1.459, 17.354]), CK (0.034, 4.34, [0.05, 0.91]), CD4+ T ( 0.029, 3.31, [1.13, 9.71]), and GGO (0.005, 5.418, [1.656, 17.729]) of patients. The median Ct value of RT-qPCR tests of the N-gene target in the Daxing B.1.1.7 group was significantly lower than the Shunyi B.1.470 group (P=0.036). The phylogenetic analysis showed that only 2 amino acid mutations in spike protein were detected in B.1.470 strains while B.1.1.7 strains had 3 deletions and 7 mutations. Interpretation: Clinical features including a more serious inflammatory response, pneumonia and a possible higher viral load were detected in the cases infected with B.1.1.7 SARS-CoV-2 variant. It could therefore be inferred that the B.1.1.7 variant may have increased pathogenicity.
Objectives: As a response to the lockdown associated with COVID-19 in the Philippines, therapy services for children with developmental disorders shifted to telehealth (i.e., teletherapy). This study evaluated the delivery of teletherapy from the perspectives of parents and therapists. Methods: Participants consisted of parents (n = 47) and therapists (n = 102) of children with developmental disorders who were receiving teletherapy during the lockdown. A mixed-methods triangulation design-convergence model was adopted; participants were invited to respond to an online survey with closed- and open-ended questions. Quantitative data were analyzed using descriptive and non-parametric inferential tests, while qualitative data were examined using thematic analysis. Results: Overall satisfaction with teletherapy was positive, with parents reporting significantly higher satisfaction compared to therapists. Satisfaction was positively associated with the frequency of teletherapy sessions for parents, and with their years of experience for therapists. The top enabling factors were family participation and effective communication. The main challenges were time constraints and difficulty with instruction and monitoring associated with the two-dimensional nature of teletherapy. The benefits included empowerment of parents and enhanced understanding of the needs of their children. Discussion: The shift to teletherapy facilitated a heightened focus on family-centered care. The evaluation findings suggest that the general satisfaction with teletherapy and the benefits associated with family-centered care will likely promote teletherapy as a service delivery mode to continue beyond the pandemic.
Many high-income countries have met the SARS-CoV-2 pandemic with overwhelming sequencing resources and have identified numerous distinct lineages, including some with notably altered biology. Over a year into the pandemic following unprecedented reductions in worldwide human mobility, distinct introduced lineages of SARS-CoV-2 without sequenced antecedents are increasingly discovered in high-income countries as a result of ongoing SARS-CoV-2 genomic surveillance initiatives. We here describe one such SARS-CoV-2 lineage, carrying many mutations and deletions in the spike protein shared with widespread variants of concern (VOCs), including E484K, S477N and deletions HV69del, Y144del, and LLA241/243del. This lineage - designated B.1.620 - is known to circulate in Lithuania and has now been found in several European states, but also in increasing numbers in central Africa owing to important recent increases in genome sequencing efforts on the continent. We provide evidence of likely ongoing local transmission of B.1.620 in Lithuania, France, Germany, Spain, Belgium and the Central African Republic. We describe the suite of mutations this lineage carries, its potential to be resistant to neutralising antibodies, travel histories for a subset of the European cases, and evidence of local B.1.620 transmission in Europe. We make a case for the likely Central African origin of this lineage by providing travel records as well as the outcomes of carefully crafted phylogenetic and phylogeographic inference methodologies, the latter of which is able to exploit individual travel histories recorded for infected travellers having entered different European countries.
Background: Effects of timing of Convalescent plasma (CP) administration on hospitalized COVID-19 patients are not established. Methods: We used the National COVID Cohort Collaborative data to perform a retrospective cohort study of hospitalized COVID-19 patients in the United States between 07-01-2020 and 12-19-2020. We stratified patients based on day of CP administration (Day 0, 1, 2, 3 and 4) from COVID-19 diagnosis. We used 35 predictors to frame matched cohorts accounting for clinical and sociodemographic characteristics. We used competing risk survival models to examine the association between CP administration and length of hospital stay with in-hospital death as a competing risk performing Gray9s test on the cumulative incidence function and Cox9s regression on cause specific hazard ratios. Results: In a cohort of 4,003 hospitalized COVID-19 patients, 197 (4.9%) received CP within the first 5 days following COVID-19 diagnosis. After adjusting for potential confounding variables, there were no statistically significant associations between day of CP administration and length of hospital stay. Day 0 CP administration signallled lower mortality but was not statistically significant (HR 0.45 [0.19-1.03]). Conclusions: We found no association between the timing of CP administration and length of stay among hospitalized COVID-19 patients.
Background: In Brazil, a 20% increase in maternal mortality rate due to COVID-19 is projected for 2020. On January 4, 2021, the P.1 SARS-CoV-2 genetic variant was firstly identified in the country and recent data has indicated an association with higher hospitalization rates and mortality. The impact of P.1 variant in the obstetric population remains unclear. Methods: We carried out a preliminary analysis of sociodemographic and clinical characteristics of COVID-19 confirmed maternal deaths (between 10-50 years old) comparing cases reported to the Brazilian official severe acute respiratory syndrome (SARS) surveillance system (SS) in 2020 with those from 2021 (until April 12, 2021). This preliminary analysis employed methods described in previous reports from our group. Results: 803 maternal deaths out of 8,248 COVID-19 maternal SARS cases with a recorded outcome were reported to the SARS-SS since March 2020. Case fatality rate was significantly higher in 2021 (15.6% vs 7.4%). The first three months of 2021 already account for 46.2% of all deaths occurred in the 13-months analysed period. COVID-19 fatal cases from 2021 had a lower proportion of at least one risk factor or comorbidity as compared to 2020 but had a higher frequency of obesity. There were no significant differences in terms of age, type of residence area (urban, rural, or peri-urban), type of funding of the notification unit (public vs. private), COVID-19 diagnostic criteria, pregnancy status (pregnancy or postpartum), cardiovascular disease or diabetes. The proportion of hospitalization, ICU admission, and respiratory support before death was also not significantly different. Conclusion: Case fatality rate was increased in the three first months of 2021 when compared to 2020. Once variables related to health care access and demographics are not significantly different and women seem to be healthier in the 2021 sample, such difference may be related to the circulation of more aggressive genetic variants in the country.
Context: Vaccine-induced immune thrombotic thrombocytopenia (VITT) has been reported after administering ChAdOx1-S recombinant COVID-19 vaccine (marketed as Vaxzevira by Astra Zeneca, Covishield). Estimates of incidence vary between countries, due to different age distributions chosen, case definitions and choice of denominator (persons vaccinated vs immunizations given). This study clarifies these estimates by pooling data from ten countries and examining differences by age group. Methods: We examined case reports, press releases and immunization data and calculated pooled estimates of VITT incidence using random effects models. Sensitivity analyses considered different combinations of countries and varying assumptions on time between vaccination and reporting of cases. Results: Pooling all countries, VITT incidence was 0.73 per 100,000 persons receiving first dose of Covishield/Vaxzevira [95% CI .43,1.23]. Incidence for age 65 and over was 0.11 per 100,000 persons [95% CI .05-.26], and significantly higher among those under age 55: 1.67 per 100,000 persons [95% CI 1.30-2.14] in the UK, 5.06 per 100,000 persons in Norway [95% CI 2.16, 11.86]. The latter had the best data on counts of persons vaccinated. Incidence for age 55 to 64 years was 0.34 [95% CI 0.13, 0.85] in the UK, lower than for under age 55. Conclusion: VITT is a rare vaccine-associated adverse event. Incidence estimates vary between jurisdictions. However, even the highest reported incidence from Norway is low - and in settings with high community transmission, lower than risk of serious outcomes associated with Covid-19. Policymakers and individuals can use these data to calculate risk-benefit ratios and better target vaccine distribution.
Veterinary and animal care workers (VACW) perform critical functions in biosecurity and public health, yet little has been done to understand the unique needs and barriers these workers face when responding during a pandemic crisis. This study evaluated VACWs9 perceived risks and roles during COVID-19, and explored barriers and facilitators in their readiness, ability, and willingness to respond during a pandemic. We deployed a survey targeting U.S. veterinary medical personnel, animal shelter and control workers, zoo and wildlife workers, plus other animal care workers. Data were collected on participants9 self-reported job and demographic factors, perceptions of risk and job efficacy, and readiness, ability, and willingness to respond during the pandemic. We found that leadership roles and older age had the strongest association with decreased perceived risk and improved job efficacy and confidence, and that increased reported contact level with others (both co-workers and the public) was associated with increased perceived risk. We determined that older age and serving in leadership positions were associated with improved readiness, willingness, and ability to respond. VACWs9 dedication to public health response, reflected in our findings, will be imperative if more zoonotic vectors of SARS-CoV-2 arise. Response preparedness in VACW can be improved by targeting younger workers not in leadership roles in support programs that center on improving job efficacy and confidence in safety protocols. These findings can be used to target intervention and training efforts to support the most vulnerable within this critical, yet often overlooked, workforce.
SARS-CoV-2 RNA in wastewater settled solids is associated with COVID-19 incidence in sewersheds and therefore, there is a strong interest in using these measurements to augment traditional disease surveillance methods. A wastewater surveillance program should provide rapid turn around for sample measurements (ideally within 24 hours), but storage of samples is necessary for a variety of reasons including biobanking. Here we investigate how storage of wastewater solids at 4C, -20C, and -80C affects measured concentrations of SARS-CoV-2 RNA. We find that short term (7-8 d) storage of raw solids at 4C has little effect on measured concentrations of SARS-CoV-2 RNA, whereas longer term storage at 4C (35-122 d) or freezing reduces measurements by 60%, on average. We show that normalizing SARS-CoV-2 RNA concentrations by concentrations of pepper mild mottle virus (PMMoV) RNA, an endogenous wastewater virus, can correct for changes during storage as storage can have a similar effect on PMMoV RNA as on SARS-CoV-2 RNA. The reductions in SARS-CoV-2 RNA in solids during freeze thaws is less than those reported for the same target in liquid influent by several authors.
The relationship between SARS-CoV-2 viral load and infectiousness is not known. Using data from a prospective cohort of index cases and high-risk contact, we reconstructed by modelling the viral load at the time of contact and the probability of infection. The effect of viral load was particularly large in household contacts, with a transmission probability that increased to as much as 37% when the viral load was greater than 10 log 10 copies per mL. The transmission probability peaked at symptom onset in most individuals, with a median probability of transmission of 15%, that hindered large individual variations (IQR: [8, 37]). The model also projects the effects of variants on disease transmission. Based on the current knowledge that viral load is increased by 2 to 4-fold on average, we estimate that infection with B1.1.7 virus could lead to an increase in the probability of transmission by 8 to 17%.
The sharp increase in the number of new COVID-19 patients in India in the second half of April 2021 has caused alarm around the world. A detailed analysis of this pandemic storm is still ahead. We present the results of anterior analysis using a generalized SIR-model (susceptible-infected-removed). The final size of this pandemic wave and its duration are predicted. Obtained results show that the COVID-19 pandemic will be a problem for mankind for a very long time.
A Phase 3 Randomized, Double-Blind Placebo Controlled, Multi-regional Trial to Evaluate the Efficacy and Safety of GT0918 for the Treatment of Mild to Moderate COVID-19 Male Patients - Condition: COVID-19
Intervention: Drug: GT0918 tablets or placebo
Sponsor: Suzhou Kintor Pharmaceutical Inc,
Not yet recruiting
Hydroxychloroquine (HCQ) as Post Exposure Prophylaxis (PEP) for Prevention of COVID-19 - Conditions: Covid19; COVID-19 Prevention
Interventions: Drug: Hydroxychloroquine (HCQ); Other: Standard care; Other: Placebo
Sponsor: Postgraduate Institute of Medical Education and Research
Recruiting
A Clinical Trial to Evaluate the Recombinant SARS-CoV-2 Vaccine (CHO Cell) for COVID-19 - Condition: COVID-19
Interventions: Biological: low-dose Recombinant SARS-CoV-2 Vaccine (CHO cell); Biological: high-dose Recombinant SARS-CoV-2 Vaccine (CHO cell); Biological: placebo
Sponsors: National Vaccine and Serum Institute, China; Lanzhou Institute of Biological Products Co., Ltd; Beijing Zhong Sheng Heng Yi Pharmaceutical Technology Co., Ltd.; Zhengzhou University
Recruiting
Safety and Efficacy of Niclosamide in Patients With COVID-19 With Gastrointestinal Infection - Condition: Covid19
Interventions: Drug: Niclosamide; Drug: Placebo
Sponsor: AzurRx BioPharma, Inc.
Recruiting
tDCS for Post COVID-19 Fatigue - Condition: Post Covid-19 Patients
Intervention: Device: Transcranial Direct Current Stimulation
Sponsor: Thorsten Rudroff
Recruiting
A Immunobridging and Immunization Schedules Study of COVID-19 Vaccine (Vero Cell), Inactivated - Condition: Covid19
Interventions: Biological: 3-doses schedule 1 of COVID-19 Vaccine (Vero Cell), Inactivated; Biological: 3-doses schedule 2 of COVID-19 Vaccine (Vero Cell), Inactivated; Biological: 3-doses schedule 3 of COVID-19 Vaccine (Vero Cell), Inactivated; Biological: 2 doses of vaccine
Sponsors: China National Biotec Group Company Limited; Beijing Institute of Biological Products Co Ltd.
Not yet recruiting
Convalescent Plasma as Adjunct Therapy for COVID-19 - Condition: COVID-19
Intervention: Biological: Convalescent plasma treatment
Sponsors: National Institute of Health Research and Development, Ministry of Health Republic of Indonesia; Indonesian Red Cross; Eijkman Institute for Molecular Biology
Recruiting
Selenium as a Potential Treatment for Moderately-ill, Severely-ill, and Critically-ill COVID-19 Patients. - Condition: Covid19
Interventions: Drug: Selenium (as Selenious Acid); Other: Placebo
Sponsors: CHRISTUS Health; Pharco Pharmaceuticals
Not yet recruiting
Protecting Our Community: COVID-19 Testing - Conditions: SARS-CoV-2; Covid19
Intervention: Diagnostic Test: Home-based SARS-CoV-2 test kit
Sponsors: Montana State University; National Institute of General Medical Sciences (NIGMS); University of Washington; Fred Hutchinson Cancer Research Center; Salish Kootenai College
Recruiting
Detection of SARS-CoV-2 in Nasopharyngeal Swabs by Using Multi-Spectral Screening System - Condition: Covid19
Intervention: Diagnostic Test: AP-23
Sponsor: Fable Biyoteknoloji San ve Tic A.S
Recruiting
Estradiol and Progesterone in Hospitalized COVID-19 Patients - Condition: Covid19
Interventions: Other: Placebo injection and placebo pill; Drug: Estradiol Cypionate 5 MG/ML; Drug: Progesterone 200 MG Oral Capsule
Sponsor: Tulane University
Not yet recruiting
Safety, Tolerability and PK of Ensovibep (MP0420 - a New Candidate With Potential for Treatment of COVID-19) - Condition: COVID-19
Interventions: Drug: Ensovibep; Drug: Placebo
Sponsor: Molecular Partners AG
Recruiting
#SafeHandsSafeHearts: An eHealth Intervention for COVID-19 Prevention and Support - Condition: Covid19
Intervention: Behavioral: eHealth for Covid-19 prevention and support
Sponsor: University of Toronto
Recruiting
COVID-19 Vaccination Take-Up - Conditions: Covid19; Vaccination
Interventions: Behavioral: Financial incentives; Behavioral: Convenient scheduling link; Behavioral: Race concordant; Behavioral: Gender concordant
Sponsors: University of Southern California; Contra Costa Health Services; J-PAL North America, State and Local Innovation Initiative; National Bureau of Economic Research Roybal Center; National Institute on Aging (NIA)
Not yet recruiting
PROphylaxis for paTiEnts at Risk of COVID-19 infecTion -V - Condition: Covid19
Interventions: Drug: Niclosamide; Drug: Placebo
Sponsors: Cambridge University Hospitals NHS Foundation Trust; LifeArc; Kidney Research UK (KRUK); UNION therapeutics; Addenbrookes Charitable Trust
Recruiting
Salvianolic acid B and its magnesium salt inhibit SARS-CoV-2 infection of Vero-E6 cells by blocking spike protein-mediated membrane fusion - OBJECTIVE: The investigate the inhibitory effects of the traditional Chinese medicine (TCM) monomer salvianolic acid B (Sal-B) and its magnesium salt Salvia Miltiorrhiza Polyphenolate Injection (ZDDY) against SARS-CoV-2 infection in vitro and explore the molecular mechanism.
Angiotensin converting enzyme 2 is a novel target of the gamma-secretase complex - Angiotensin converting enzyme 2 (ACE2) is a key regulator of the renin-angiotensin system, but also the functional receptor of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Based on structural similarity with other γ-secretase (γS) targets, we hypothesized that ACE2 may be affected by γS proteolytic activity. We found that after ectodomain shedding, ACE2 is targeted for intramembrane proteolysis by γS, releasing a soluble ACE2 C-terminal fragment. Consistently, chemical or…
SARS-CoV-2 spike protein stabilized in the closed state induces potent neutralizing responses - The majority of SARS-CoV-2 vaccines in use or advanced development are based on the viral spike protein (S) as their immunogen. S is present on virions as pre-fusion trimers in which the receptor binding domain (RBD) is stochastically open or closed. Neutralizing antibodies have been described against both open and closed conformations. The long-term success of vaccination strategies depends upon inducing antibodies that provide long-lasting broad immunity against evolving SARS-CoV-2 strains….
ILRUN downregulates ACE2 expression and blocks infection of human cells by SARS-CoV-2 - The human protein-coding gene ILRUN (inflammation and lipid regulator with UBA-like and NBR1-like domains, previously C6orf106) was identified as a proviral factor for Hendra virus infection and recently characterised to function an inhibitor of type-I interferon expression. Here, we have utilised RNA-seq to define cellular pathways regulated by ILRUN in the context of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection of Caco-2 cells. We find that inhibition of ILRUN…
Targeting the conserved stem loop 2 motif in the SARS-CoV-2 genome - RNA structural elements occur in numerous single stranded (+)-sense RNA viruses. The stem-loop 2 motif (s2m) is one such element with an unusually high degree of sequence conservation, being found in the 3’ UTR in the genomes of many astroviruses, some picornaviruses and noroviruses, and a variety of coronaviruses, including SARS-CoV and SARS-CoV-2. The evolutionary conservation and its occurrence in all viral subgenomic transcripts implicates a key role of s2m in the viral infection cycle. Our…
beta-D-N 4-hydroxycytidine (NHC) Inhibits SARS-CoV-2 Through Lethal Mutagenesis But Is Also Mutagenic To Mammalian Cells - Mutagenic ribonucleosides can act as broad-based antiviral agents. They are metabolized to the active ribonucleoside triphosphate form and concentrate in the genomes of RNA viruses during viral replication. β-D-N 4-hydroxycytidine (NHC, the initial metabolite of molnupiravir) is more than 100-fold more active than ribavirin or favipiravir against SARS-CoV-2, with antiviral activity correlated to the level of mutagenesis in virion RNA. However, NHC also displays host mutational activity in an…
Identification of phytocompounds from Houttuynia cordata Thunb. as potential inhibitors for SARS-CoV-2 replication proteins through GC-MS/LC-MS characterization, molecular docking and molecular dynamics simulation - The COVID-19 pandemic caused by Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) is a massive viral disease outbreak of international concerns. The present study is mainly intended to identify the bioactive phytocompounds from traditional antiviral herb Houttuynia cordata Thunb. as potential inhibitors for three main replication proteins of SARS-CoV-2, namely Main protease (Mpro), Papain-Like protease (PLpro) and ADP ribose phosphatase (ADRP) which control the replication process. A…
Current understanding on molecular drug targets and emerging treatment strategy for novel coronavirus-19 - SARS-CoV-2 is an enveloped positive-sense RNA virus, contain crown-like spikes on its surface, exceptional of large RNA genome, and a special replication machinery. Common symptoms of SARS-CoV-2 include cough, common cold, fever, sore throat, and a variety of severe acute respiratory disease (SARD) such as pneumonia. SARS-CoV-2 infects epithelial cells, T-cells, macrophages, and dendritic cells and also influences the production and implantation of pro-inflammatory cytokines and chemokines….
Covid-19 Clinical Course and Blood Groups: Turkish Population-Based Study - CONCLUSION: Our study revealed that ABO and Rh blood groups do not have any impact on the rate of hospital admission, hospital and ICU stay, MV support, and CFR.
The Contribution of Biophysics and Structural Biology to Current Advances in COVID-19 - Critical to viral infection are the multiple interactions between viral proteins and host-cell counterparts. The first such interaction is the recognition of viral envelope proteins by surface receptors that normally fulfil other physiological roles, a hijacking mechanism perfected over the course of evolution. Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the etiological agent of coronavirus disease 2019 (COVID-19), has successfully adopted this strategy using its spike…
Role of epithelial-endothelial cell interaction in the pathogenesis of SARS-CoV-2 infection - CONCLUSIONS: This study evaluates the role of endothelial cells in the development of clinical disease caused by SARS-CoV-2, and the importance of endothelial cell-epithelial cell interaction in the pathogenesis of human COVID-19 diseases.
Chloroquine and Hydroxychloroquine for the Prevention and Treatment of COVID-19: A Fiction, Hope or Hype? An Updated Review - In December 2019, the novel coronavirus disease pandemic (COVID-19) that began in China had infected so far more than 109,217,366 million individuals worldwide and accounted for more than 2,413,912 fatalities. With the dawn of this novel coronavirus (SARS-CoV-2), there was a requirement to select potential therapies that might effectively kill the virus, accelerate the recovery, or decrease the case fatality rate. Besides the currently available antiviral medications for human immunodeficiency…
Network pharmacology approach to decipher signaling pathways associated with target proteins of NSAIDs against COVID-19 - Non-steroidal anti-inflammatory drugs (NSAIDs) showed promising clinical efficacy toward COVID-19 (Coronavirus disease 2019) patients as potent painkillers and anti-inflammatory agents. However, the prospective anti-COVID-19 mechanisms of NSAIDs are not evidently exposed. Therefore, we intended to decipher the most influential NSAIDs candidate(s) and its novel mechanism(s) against COVID-19 by network pharmacology. FDA (U.S. Food & Drug Administration) approved NSAIDs (19 active drugs and one…
Self-Assembling Nanoparticle Vaccines Displaying the Receptor Binding Domain of SARS-CoV-2 Elicit Robust Protective Immune Responses in Rhesus Monkeys - SARS-CoV-2 caused the COVID-19 pandemic that lasted for more than a year. Globally, there is an urgent need to use safe and effective vaccines for immunization to achieve comprehensive protection against SARS-CoV-2 infection. Focusing on developing a rapid vaccine platform with significant immunogenicity as well as broad and high protection efficiency, we designed a SARS-CoV-2 spike protein receptor-binding domain (RBD) displayed on self-assembled ferritin nanoparticles. In a 293i cells…
Uncoupling of macrophage inflammation from self-renewal modulates host recovery from respiratory viral infection - Tissue macrophages self-renew during homeostasis and produce inflammatory mediators upon microbial infection. We examined the relationship between proliferative and inflammatory properties of tissue macrophages by defining the impact of the Wnt/β-catenin pathway, a central regulator of self-renewal, in alveolar macrophages (AMs) . Activation of β-catenin by Wnt ligand inhibited AM proliferation and stemness, but promoted inflammatory activity. In a murine influenza viral pneumonia model,…
IMPROVEMENTS RELATED TO PARTICLE, INCLUDING SARS-CoV-2, DETECTION AND METHODS THEREFOR - - link
A COMPREHENSIVE DISINFECTION SYSTEM DURING PANDEMIC FOR PERSONAL ITEMS AND PROTECTIVE EQUIPMENT (PPE) TO SAFEGUARD PEOPLE - The current Covid-19 pandemic has led to an enormous demand for gadgets / objects for personal protection. To prevent the spread of virus, it is important to disinfect commonly touched objects. One of the ways suggested is to use a personal UV-C disinfecting box that is “efficient and effective in deactivating the COVID-19 virus. The present model has implemented the use of a UV transparent material (fused silica quartz glass tubes) as the medium of support for the objects to be disinfected to increase the effectiveness of disinfection without compromising the load bearing capacity. Aluminum foil, a UV reflecting material, was used as the inner lining of the box for effective utilization of the UVC light emitted by the UVC lamps. Care has been taken to prevent leakage of UVC radiation out of the system. COVID-19 virus can be inactivated in 5 minutes by UVC irradiation in this disinfection box - link
UBIQUITOUS COMPUTING SYSTEM FOR MENTAL HEALTH MONITORING OF PERSON DURING THE PANDEMIC OF COVID-19 - - link
USE OF IMINOSUGAR COMPOUND IN PREPARATION OF ANTI-SARS-COV-2 VIRUS DRUG - - link
Compositions and methods for the treatment of severe acute respiratory syndrome coronavirus 2 (SARS-COV-2) infection - - link
用于检测新型冠状病毒的试纸和试剂盒 - 本发明涉及生物技术和免疫检测技术领域，具体涉及一种用于检测新型冠状病毒的试纸和试剂盒。所述试纸或试剂盒含有抗体1和/或抗体2，所述抗体1的重、轻链可变区的氨基酸序列分别如SEQ ID NO:1‑2所示，所述抗体2的重、轻链可变区的氨基酸序列分别如SEQ ID NO:3‑4所示。本发明对于大批量的新型冠状病毒样本，包括新型冠状病毒突变（英国、南非）与非突变株的人血清、鼻咽拭子等样本的检测有普遍检测意义，避免突变株的漏检。 - link
Die Erfindung betrifft ein Fahrgastleitsystem zum Leiten von mit einem Fahrzeug (1) mit wenigstens zwei Türen (2.L, 2.R) transportieren Fahrgästen (3), mit wenigstens einem Sensor (4) zur Überwachung der Fahrgäste (3), wenigstens einem Anzeigemittel (5) zur Ausgabe von Leitinformationen, wenigstens einem Aktor zum Öffnen oder Verriegeln einer Tür (2.L, 2.R) und wenigstens einer Recheneinheit (7). Das erfindungsgemäße Fahrgastleitsystem ist dadurch gekennzeichnet, dass die Recheneinheit (7) dazu eingerichtet ist durch Auswertung vom wenigstens einen Sensor (4) erzeugter Sensordaten zu erkennen an welcher Tür (2.L, 2.R) des Fahrzeugs (1) Fahrgäste (3) ein- und/oder aussteigen möchten und wenigstens eine Tür (2.L, 2.R) für einen Ausstieg festzulegen und/oder wenigstens eine Tür (2.L, 2.R) für einen Einstieg festzulegen, sodass eine Anzahl an Begegnungen von sich durch das Fahrzeug (1) bewegender Fahrgäste (3) und/oder aus dem Fahrzeug (1) aussteigenden und/oder in das Fahrzeug (1) einsteigenden Fahrgästen (3) minimiert wird.
Vorrichtung zum Desinfizieren, der Körperpflege oder dergleichen mittels einer flüssigen oder cremigen Substanz (20), dadurch gekennzeichnet, dass die Vorrichtung mit einem elektrisch betriebenen Erinnerungs-Modul und einem Vorratsbehälter (10) für die Substanz (20) versehen ist, die Substanz (20) in dosierter Menge zur Ausgabeöffnung (9) gefördert wird und die Vorrichtung dazu geeignet ist, am Körper oder der Kleidung einer Person getragen zu werden.
Die Erfindung betrifft ein Verfahren zur laborbasierten Überprüfung und/oder weiteren Ausdifferenzierung einer im Schnelltestverfahren erhaltenen Diagnose einer Infektionskrankheit, wobei im Rahmen des Schnelltestverfahrens eine flüssige Patientenprobe auf ein Objekt aus einem porösen Material aufgetragen wird und wobei dieses Objekt nach Trocknung der flüssigen Patientenprobe an das diagnostische Labor übermittelt wird. Im Labor werden dann die eingetrockneten Probenreste aus dem porösen Material ausgelöst und analysiert.
针对新型冠状病毒核衣壳蛋白的抗体或其抗原结合片段及其应用 - 本发明提供了一种针对新型冠状病毒核衣壳蛋白的抗体或其抗原结合片段及其应用，所述抗体选自mAb6抗体、mAb7抗体、mAb8抗体和mAb9抗体中的任意一种；且所述抗体由保藏号为CCTCC NO：C2020236、CCTCC NO：C2020237、CCTCC NO：C2020238或CCTCC NO：C2020239的杂交瘤细胞分泌。利用所述抗体能够检测环境样品和/或生物样品中新型冠状病毒或者其抗原的存在情况。此外，本发明还提供了利用所述抗体制备得到的新型冠状病毒检测试剂盒，能够在感染病毒早期就检测出核衣壳蛋白，为临床检测新型冠状病毒提供了快速、准确的手段。 - link