Instruct: Identify the main category of Medrxiv papers based on the titles.
Query: Large-scale social media language analysis reveals emotions and behaviours associated with nonmedical prescription drug use
Quantifying representativeness in randomized clinical trials using machine learning fairness metrics
A cost-effectiveness analysis of front-line treatment strategies in early stage follicular lymphoma
Life course traumas, phenotypic aging, and cardiovascular disease: retrospective analysis of 104,939 UKB participants
Massive social protests amid the pandemic in selected  Colombian  cities:  Did  they increase COVID-19 cases?
The Use/Abuse of Oral Contraceptive Pills Among Males: A Mixed-Method Explanatory Sequential Study Over Jordanian Community Pharmacists
The impact of COVID-19 pandemic on influenza surveillance: a systematic review and meta-analysis
Effectiveness of the Covid-19 vaccines in preventing infection in dental practitioners: results of a cross-sectional questionnaire based survey
Rapid, widespread, and preferential increase of SARS-CoV-2 B.1.1.7 variant in Houston, TX, revealed by 8,857 genome sequences
Simulation and predictions of a new COVID-19 pandemic wave in Ukraine with the use of generalized SIR model
Clinical Determinants and Predictors for Prognosis of SARS-CoV-2 Infected Pediatric Patients in Saudi Arabia
Weak humoral immune reactivity among residents of long-term care facilities following one dose of the BNT162b2 mRNA COVID-19 vaccine
Remote care for mental health: qualitative study with service users, carers and staff during the COVID-19 pandemic
Vaccine effectiveness of CanSino (Adv5-nCoV) COVID-19 vaccine among childcare workers -- Mexico, March-December 2021
Retention of Neutralizing response against SARS-CoV-2 Omicron variant in Sputnik V vaccinated individuals
Phylogenetic-based inference reveals distinct transmission dynamics of SARS-CoV-2 variant of concern Gamma and lineage P.2 in Brazil
Breakthrough infection with SARS-CoV-2 and its predictors among healthcare workers in a medical college and hospital complex in Delhi, India
Impact of COVID-19-related disruptions to measles, meningococcal A, and yellow fever vaccination in 10 countries
Use of convalescent plasma in patients with coronavirus disease (Covid-19): Systematic review and meta-analysis
A highly efficient T-cell immunoassay provides assessment of B cell help function of SARS-CoV-2 specific memory CD4+ T cells
No Evidence that Ongoing HIV-Specific Immune Responses Contribute to Persistent Inflammation and Immune Activation in Persons on Long-Term ART
State of Emergency and Human Mobility during the COVID-19 Pandemic
Trends and predictors of Readmissions after Left ventricular assist device
Randomized, double blind, placebo controlled, clinical trial to study co-administration of Ashwagandha on safety, immunogenicity, and protection with COVID-19 vaccine: A Study Protocol
Investigating the contributions of circadian pathway and insomnia risk genes to autism and sleep disturbances
A semi-parametric, state-space compartmental model with time-dependent parameters for forecasting COVID-19 cases, hospitalizations, and deaths