Instruct: Identify the main category of the given Medrxiv paper based on the title.
Query: The Effect of Pandemic Prevalence on the Reported Efficacy of SARS-CoV-2 Vaccine Candidates: A Systematic Review and Meta-analysis
Bovine Colostrum Derived Antibodies Against SARS-CoV-2 Show Great Potential to Serve as a Prophylactic Agent
Prioritizing COVID-19 vaccination efforts and dose allocation within Madagascar
Irremediable psychiatric suffering in the context of physician assisted death: a Delphi-study
Extract, Transform, Load Framework for the Conversion of Health Databases to OMOP
The polymorphism L412F in TLR3 inhibits autophagy and is a marker of severe COVID-19 in males.
Early introductions and community transmission of SARS-CoV-2 variant B.1.1.7 in the United States
Controlling the pandemic during the SARS-CoV-2 vaccination rollout: a modeling study
'It was brutal. It still is': A qualitative analysis of the challenges of bereavement during the COVID-19 pandemic reported in two national surveys
Could widespread use of antiviral treatment curb the COVID-19 pandemic? A modeling study.
Modelling, Simulations and Analysis of the First and Second COVID-19 Epidemics in Beijing
A Sex-Specific Genome-Wide Association Study of Depression Phenotypes in UK Biobank
Increased Transmissibility of SARS-CoV-2 Lineage B.1.1.7 by Age and Viral Load: Evidence from Danish Households
Multi-omics of MLL-rearranged B-cell precursor acute lymphoblastic leukemia reveals broad glycoproteome remodelling
Emergence of the SARS-CoV-2 B.1.1.7 lineage and its characteristics at an outpatient testing site in Berlin, Germany, January-March 2021
Symptomatology associated with the diffusion of the SARS-CoV-2 Lambda variant in Peru: An infodemiologic analysis
The Mean Unfulfilled Lifespan (MUL): A New Indicator of the Impact of Mortality Shocks on the Individual Lifespan
Time trends in social contacts before and during the COVID-19 pandemic: the CONNECT study
Association between COVID-19, mobility and environment in Sao Paulo, Brazil
COVID-19 Incidence and Hospitalization During the Delta Surge Were Inversely Related to Vaccination Coverage Among the Most Populous U.S. Counties
Online prescribing for sexually transmitted infections 	- what is on offer? An evaluation of internet pharmacies based in the United Kingdom
Joint associations between objectively measured physical activity volume and intensity with body-fatness. The Fenland Study.
Estimation of SARS-CoV-2 antibody prevalence through integration of serology and incidence data
Pulmonary Fibrosis after COVID-19 is Associated with Severity of Illness and Blood Leukocyte Telomere Length
Combining science and social engagement againstCovid-19 in a Brazilian Slum
Comparison of adverse events between COVID-19 and Flu vaccines