Instruct: Identify the main category of the given medRxiv paper based on the title.
Query: Three separate spike antigen exposures by COVID-19 vaccination or SARS-CoV-2 infection elicit strong humoral immune responses in healthcare workers
Increased prevalence of AB group and FY*A red blood cell antigen in Caucasian SARS-CoV-2 convalescent plasma donors
Analysis of the prediction of the 2021 time-evolution of the COVID-19 Pandemic in Italy using a Planck's distribution
A multi-ethnic polygenic risk score is associated with hypertension prevalence and progression throughout adulthood
A population-level analysis of the protective effects of androgen deprivation therapy against COVID-19 disease incidence and severity
Estimating COVID-19 infection fatality rate in Mumbai during 2020
Systematic review automation tool use by systematic reviewers, health technology assessors and clinical guideline developers: tools used, abandoned, and desired
Immunogenomic intertumor heterogeneity across primary and metastatic sites in a patient with lung adenocarcinoma
Reconstructing the course of the COVID-19 epidemic over 2020 for US states and counties: results of a Bayesian evidence synthesis model
Religiosity and stigmatization related to mental illness among African-Americans and Black immigrants: cross-sectional observational study and moderation analysis
Memory recovery is related to default mode network impairment and neurite density during brain tumours treatment
Anti-SARS-CoV-2 seropositivity among medical students in Copenhagen
Second versus first wave of COVID-19 deaths: shifts in age distribution and in nursing home fatalities
'I don't feel like I'm learning how to be a doctor': early insights regarding the impact of Covid-19 on UK medical student professional identity
Patient-specific analysis of bicuspid aortic valve hemodynamics using a fully coupled fluid-structure interaction (FSI) model
In vitro Characterization of SARS-CoV-2 Protein Translated from the Moderna mRNA-1273 Vaccine
The impact of social restrictions during the COVID-19 pandemic on the physical activity levels of older adults: a baseline analysis of the CHARIOT COVID-19 Rapid Response prospective cohort study
Depression stigma effects on help-seeking attitudes in college students: Baseline results of a randomized controlled trial
COVID-19 onset reduced the sex ratio at birth in South Africa
Government messaging about COVID-19 vaccination in Canada and Australia: a Narrative Policy Framework study
Cognitive improvement after dual-task training in Parkinsons disease: a follow-up study
COVID-19 Pandemic and Academic Speculation of Medical Students of Bangladesh: A Cross-sectional, Comparative Study
Adverse childhood experiences and multiple mental health outcomes through adulthood: a prospective birth cohort study
Variation in colorectal cancer treatment and outcomes in Scotland: real world evidence from national linked administrative data
Anti-SARS-CoV-2 cellular immunity in 571 vaccinees assessed using an interferon-γ release assay
Potential COVID-19 vaccination opportunities in primary care practices in the United States