Instruct: Identify the main category of the given Medrxiv paper based on the title.
Query: IMPACT OF COVID-19 PANDEMIC ON SICKNESS ABSENCE FOR MENTAL ILL HEALTH IN NATIONAL HEALTH SERVICE STAFF
Investigation of air change rate and aerosol behavior during an outbreak of COVID-19 in a geriatric care facility
Safety and immunogenicity of the third booster dose with inactivated, viral vector, and mRNA COVID-19 vaccines in fully immunized healthy adults with inactivated vaccine
A cluster randomised trial of the impact of a policy of daily testing for contacts of COVID-19 cases on attendance and COVID-19 transmission in English secondary schools and colleges
Ketamine and attentional bias to threat: dynamic causal modeling of magnetoencephalographic connectivity in treatment-resistant depression
Comparative assessment of SARS-CoV-2 serology in healthcare workers with Abbott Architect, Roche Elecsys and The Binding site ELISA immunoassays.
Associations between governor political affiliation and COVID-19 cases, deaths, and testing in the United States
Artificial intelligence for diagnosis and prognosis in neuroimaging for dementia; a systematic review
You're too young to have an eye problem: Reasons for nonadherence to referrals for follow-up eye care for schoolchildren in Nigeria -- a descriptive qualitative study
Abdominal Imaging Associates Body Composition with COVID-19 Severity
Evaluating the impact of keeping indoor dining closed on COVID-19 rates among large US cities: a quasi-experimental design
Modelling COVID-19 Vaccine Breakthrough Infections in Highly Vaccinated Israel - the effects of waning immunity and third vaccination dose
Increased circulating levels of angiotensin-(1-7) in severely ill COVID-19 patients
Drivers of adaptive evolution during chronic SARS-CoV-2 infections
Metagenomic and single-cell RNA-seq survey of the H. pylori-infected stomach in asymptomatic individuals
Oral, similar to intranasal, administration of oxytocin decreases top-down social attention
Predictors of COVID-19 vaccine uptake: An online longitudinal study of US Veterans and non-Veterans
Early Antibody Responses Associated with Survival in COVID19 Patients
Real-time tracking and forecasting of the COVID-19 outbreak in Kuwait: a mathematical modeling study
Clinical efficacy of Early Administration of Convalescent Plasma among COVID-19 Cases in Egypt
A Cross-Country Analysis of the Effectiveness of COVID-19 Vaccines in Reducing Mortality Rates within the EU
Mutational landscape of high-grade B-cell lymphoma with MYC-, BCL2 and/or BCL6 rearrangements characterized by whole-exome sequencing
Case Series of Thrombosis with Thrombocytopenia Syndrome following COVID-19 vaccination--United States, December 2020-August 2021
Characterization of annual average traffic-related air pollution levels (particle number, black carbon, nitrogen dioxide, PM2.5, carbon dioxide) in the greater Seattle area from a year-long mobile monitoring campaign
If we cannot eliminate them, should we tame them? Mathematics underpinning the dose effect of virus infection and its application on covid-19 virulence evolution
Performance of Gazelle COVID-19 point-of-care test for detection of nucleocapsid antigen from SARS-CoV-2