Instruct: Identify the main category of the given Medrxiv paper based on its title.
Query: Comparison of two highly-effective mRNA vaccines for COVID-19 during periods of Alpha and Delta variant prevalence
Prediction of severe COVID-19 cases requiring intensive care in Osaka, Japan
Estimating local outbreak risks and the effects of non-pharmaceutical interventions in age-structured populations: SARS-CoV-2 as a case study
COVID-19 infection and hospitalization according to the burden of chronic noncommunicable diseases in Brazil
Impact of the COVID-19 pandemic on cognitive function in Japanese community-dwelling older adults in a class for preventing cognitive decline
Feasibility and diagnostic accuracy of saliva-based SARS-CoV-2 screening in educational settings and children aged < 12 years
Assessing multiplex tiling PCR sequencing approaches for detecting genomic variants of SARS-CoV-2 in municipal wastewater
The SARS-CoV-2 infection among students in the University of Porto: a cross-sectional study
Interictal SEEG resting-state connectivity localizes seizure onset zone and predicts seizure outcome
An Ecological Study to Investigate Links Between Atmospheric Pollutants From Farming and SARS-CoV-2 Mortality
Modeling the population effects of epitope specific escape mutations in SARS-CoV-2 to guide vaccination strategies
Characterization of A Novel Autoimmune Encephalitis Associated Antibody against CRMP2
Lab-on-a-chip multiplexed electrochemical sensor enables simultaneous detection of SARS-CoV-2 RNA and host antibodies
A New Approach for Timely Systematic Reviews of Rapidly Evolving Research: Identifying Evidence in Which We Can Place Our Confidence
Phase 2 dose-ranging study of the virologic efficacy and safety of the combination COVID-19 antibodies casirivimab and imdevimab in the outpatient setting
A Cross Sectional Study To Assess The Attitude Regarding Online Lecture Among Nursing College Students After Impact of Covid-19 At Selected College of Nursing, Nadiad.
Family responsibilities and mental health of kindergarten educators during the first COVID-19 pandemic lockdown in Ontario, Canada
Determinants of mortality among COVID-19 patients with diabetes mellitus in Addis Ababa, Ethiopia, 2022: An unmatched case-control study
Rapid initiation of nasal saline irrigation to reduce severity in high-risk COVID+ outpatients: a randomized clinical trial compared to a national dataset observational arm
Using multivariate models to examine the impact of COVID-19 pandemic and gender differences on health and health care
A Feasibility Trial to Evaluate the Composite Efficacy of Inhaled Nitric Oxide in the Treatment of Covid 19 Pneumonia : Impact on Viral Load and Clinical Outcomes
Granulocyte-macrophage colony-stimulating factor (GM-CSF) antibodies treatment for COVID-19 patients: a meta-analysis
Burden of SARS-CoV-2 and protection from symptomatic second infection in children
Assessing the risk of vaccine-driven virulence evolution in SARS-CoV-2
Evaluation of individual and ensemble probabilistic forecasts of COVID-19 mortality in the US
Impact of health system strengthening on delivery strategies to improve child immunization coverage and inequalities in rural Madagascar