Instruct: Identify the main category of medRxiv papers based on their titles.
Query: Issues of Random Sampling with Rapid Antigen Tests for COVID-19 Diagnosis: A Special Reference to Kalmunai RDHS Division
Is Point-of-Care testing feasible and safe in care homes in England? An exploratory usability and accuracy evaluation of Point-of-Care Polymerase Chain Reaction test for SARS-COV-2
Oxymatrine Induces Autophagy and Apoptosis in Human Poorly Differentiated Gastric Adenocarcinoma Cells via Slit2/Robo1 Signals
A quantitative risk estimation platform for indoor aerosol transmission of COVID-19
Using one-to-many urine proteome comparisons to provide clues for fever of unknown origin
Comparative quantitative analysis of SARS-CoV-2 Spike neutralizing antibody titers following  two anti COVID-19 vaccines in India
Use of Machine Learning for Long Term Planning and Cost Minimization in Healthcare Management
Relative contribution of leaving home for work or education, transport, shopping and other activities on risk of acquiring COVID-19 infection outside the household in the second wave of the pandemic in England and Wales
Preserved recognition of Omicron Spike following COVID-19 mRNA vaccination in pregnancy
High Rates of Rapid Antigen Test Positivity After 5 Days of Isolation for COVID-19
Association of frailty, age, and biological sex with SARS-CoV-2 mRNA vaccine-induced immunity in older adults
Causal Mediation Analysis with Multiple Causally Ordered and Non-ordered Mediators based on Summarized Genetic Data
Determining the Impact of Ethnicity on the Accuracy of Measurements of Oxygen Saturations. A Retrospective Cohort Study
Influence of sex on disease severity in children with COVID-19 and Multisystem Inflammatory Syndrome in Latin America
The effects of walking in nature on negative and positive affect in adult psychiatric outpatients with major depressive disorder: A randomized-controlled study
The feasibility of targeted test-trace-isolate for the control of SARS-CoV-2 variants
COVID-19 vaccine hesitancy January-May 2021 among 18-64 year old US adults by employment and occupation
How reacted USA with the first case of Bubonic Plague on 21 August?
Father absence and trajectories of offspring mental health across adolescence and young adulthood: findings from a UK-birth cohort
SARS-COV-2 antibody prevalence in patients on dialysis in the US in January 2021
Multi-level Predictors of Depression Symptoms in the Adolescent Brain Cognitive Development (ABCD) Study
Hidden fraction of Polish population immune to SARS-CoV-2 in May 2021
POPULATION-BASED SERO-EPIDEMIOLOGICAL STUDY PROTOCOL FOR THE IMPACT OF SMOKING ON SARS-COV-2 INFECTION AND COVID-19 OUTCOMES - THE TROINA STUDY
Lead-OR: A Multimodal Platform for Deep Brain Stimulation Surgery
AI-VDT can Help in Detecting Primary Lung Cancer
Optimal design for phase 2 studies of SARS-CoV-2 antiviral drugs