Instruct: Identify the main category of the given Medrxiv paper based on its title.
Query: Non-modifiable factors as moderators of the relationship between physical activity and brain volume: A cross-sectional UK Biobank study
Incidence of delirium in an acute geriatric community hospital: an exploratory analysis of an observational cohort study controlled with a meta-analysis of incidences from literature.
SARS-CoV-2 antibody profile of naturally infected and vaccinated individuals detected using qualitative, semi-quantitative and multiplex immunoassays
Disparate Impacts on Online Information Access during the COVID-19 Pandemic
Vulnerability and informal caregiver: a scoping review.
The evolving SARS-CoV-2 epidemic in Africa: Insights from rapidly expanding genomic surveillance.
The continuous evolution of SARS-CoV-2 in South Africa: a new lineage with rapid accumulation of mutations of concern and global detection
Attitude and Perceived Barriers towards Research among Undergraduate Medical Students of Bangladesh
NUTRITIONAL IMMUNITY, ZINC SUFFICIENCY AND COVID-19 MORTALITY IN SOCIALLY SIMILAR EUROPEAN POPULATIONS
The Construction and Analysis of ceRNA Network and Immune Infiltration in Kidney Renal Clear Cell Carcinoma
Immunogenicity of COVID-19 Vaccination in Immunocompromised Patients: An Observational, Prospective Cohort Study Interim Analysis
Forecasting Preventive Dental Quality Measures
Detection of B.1.351 and B.1.1.7 SARS-CoV-2 variants in Monterrey metropolitan area in Northeast Mexico
Effect of SARS-CoV-2 infection on outcome of cancer patients: A systematic review and meta-analysis of studies of unvaccinated patients
The Covid-19 containment effects of public health measures - A spatial difference-in-differences approach
Issues of Random Sampling with Rapid Antigen Tests for COVID-19 Diagnosis: A Special Reference to Kalmunai RDHS Division
Lower help-seeking intentions and subsequent depressive symptoms among adolescents with high autistic traits: A population-based cohort study
A new combination testing methodology to identify accurate and economical point-of-care testing strategies
The association between WASH, nutrition, and early childhood growth faltering in rural Cambodia: a cross-sectional risk factor analysis
How to coordinate vaccination and social distancing to mitigate SARS-CoV-2 outbreaks
The effects of quality of evidence communication on perception of public health information about COVID-19: two randomised controlled trials
Changes in HIV Treatment Differentiated Care Utilization During the COVID-19 Pandemic in Zambia
Applications of geospatial analyses in health research among homeless people: A systematic scoping review of available evidence
COVID-19 symptom frequency comparison: non-hospitalised positively and negatively tested persons with flu-like symptoms in Austria
Interpregnancy interval and pregnancy loss in a rural South Africa: A population-based cohort study
An analysis of patients' perspectives on qualitative olfactory dysfunction using social media