Instruct: Identify the main category of the given Medrxiv paper based on its title.
Query: Vitamin D and acute respiratory infection: secondary analysis of a previous randomised controlled trial and updated meta-analyses
Metabolic changes induced by pharmacological castration of young, healthy men: a study of the plasma metabolome
Assessing the performance of a serological point-of-care test in measuring detectable antibodies against SARS-CoV-2
Escape of SARS-CoV-2 501Y.V2 variants from neutralization by convalescent plasma
Emulation of epidemics via Bluetooth-based virtual safe virus spread: experimental setup, software, and data
Mass Testing with Contact Tracing Compared to Test and Trace for Effective Suppression of COVID-19 in the UK: A rapid review
Safety and immunogenicity of a SARS-CoV-2 recombinant protein nanoparticle vaccine (GBP510) adjuvanted with AS03: a phase 1/2, randomized, placebo-controlled, observer-blinded trial
Examining impacts of approval of home use of misoprostol in England on access to medical abortion
Systematic review and meta-analysis to estimate the burden of fatal and non-fatal overdose among people who inject drugs
Genetic influences on neurodevelopmental disorders and their overlap with co-occurring conditions in childhood and adolescence: A meta-analysis.
Strategies for COVID-19 vaccination under a shortage scenario: a geo-stochastic modelling approach.
Anatomical Predictors of Left Internal Carotid Artery Catheterization in Transradial Angiography
Correlates of and changes in aerobic physical activity and strength training before and after the onset of COVID-19 pandemic in the UK. Findings from the HEBECO study.
Tau-PET and in vivo Braak-staging as a prognostic marker in Alzheimer's disease
Clinical Trends Among U.S. Adults Hospitalized with COVID-19, March-December 2020
Deep Learning-based Prediction of Early Cerebrovascular Events after Transcatheter Aortic Valve Replacement
INTERCEPT pathogen reduction of platelet concentrates induces trans-arachidonic acids and affects eicosanoid formation
Genome-wide pleiotropy analysis identifies novel blood pressure variants and improves its polygenic risk scores
Association of socioeconomic status with arterial stiffness in older African American and White Adults: The ARIC Study Cohort
Migration and Outbreaks of Vaccine-Preventable Disease in Europe: A Systematic Review
Modelling optimal vaccination strategies against Covid-19 in a context of Gamma variant predominance in Brazil
Delay of TB patients in diagnosis in a conflict setting of Mogadishu, Somalia - a cross-sectional study
Frailty is a predictor of medication-related harm requiring healthcare utilisation: a multicentre prospective cohort study
Demonstrate, observe, assist perform (DOAP) versus structured educational video (SEV) in imparting standard skill in male urinary bladder catheterisation
Prevalence and determinants of oral and cervicogenital HPV infection: baseline analysis of the MHOC cohort study
Increased neutralization and IgG epitope identification after MVA-MERS-S booster vaccination against Middle East respiratory syndrome