Instruct: Identify the main category of the given Medrxiv paper based on the title.
Query: Effectiveness and Safety of MSC Cell Therapies for Hospitalized Patients with COVID-19: A Systematic Review and Meta-analysis
Aerosol measurement identifies SARS-CoV 2 PCR positive adults compared with healthy controls
Single-dose mRNA vaccine effectiveness against SARS-CoV-2 in healthcare workers extending 16 weeks post-vaccination: a test-negative design from Quebec, Canada
Perceptions on undertaking regular asymptomatic self-testing for COVID-19 using lateral flow tests: A qualitative study of university students and staff
Genome-wide association study identifies two new loci associated with anti-NMDAR encephalitis
Symptoms of COVID-19 infection and magnitude of antibody response in a large community-based study
Effectiveness of ChAdOx1-S COVID-19 Booster Vaccination against the Omicron and Delta variants in England
Powerful gene-based testing by integrating long-range chromatin interactions and knockoff genotypes
Trends and Variation in Data Quality on the EU Clinical Trials Register: A Cross-Sectional Study
Pharmacokinetics and safety of XAV-19, a swine glyco-humanized polyclonal anti-SARS-CoV-2 antibody, for COVID-19-related moderate pneumonia: a randomized, double-blind, placebo-controlled, phase IIa study
Comorbid chronic pain and depression: Shared risk factors and differential antidepressant effectiveness
Examining the intersection of child protection and public housing: development, health and justice outcomes using linked administrative data
Evaluating the Long-Term Efficacy of COVID-19 Vaccines
Atmospheric PM2.5 before and after Lockdown in relation to COVID-19 Evolution and daily Viral Counts: Could Viral Natural Selection have occurred due to changes in the Airborne Pollutant PM2.5 acting as a Vector for SARS-CoV-2?
Capturing Global, Predicting Local for ControllingAntimicrobial Resistance: a retrospective multivariable analysis
Child and caregiver mental health during 12 months of the COVID-19 pandemic in Australia: findings from national repeated cross-sectional surveys
NeuroEPO and cognitive function in Parkinsons disease in a randomized placebo-controlled and post-trial studies
Drug interactions in hospital prescriptions in Denmark: Prevalence and associations with adverse outcomes
SARS-CoV-2 Omicron neutralization and risk of infection among elderly after a booster dose of Pfizer vaccine
A precise score for the regular monitoring of COVID-19 patients condition validated within the first two waves of the pandemic
An optimized flow cytometry protocol for simultaneous detection of T cell activation induced markers and intracellular cytokines: application to SARS-Cov-2 vaccinated individuals
Dique Filipeia: A rehabilitation protocol for non-intubated COVID-19 in-hospital patients
Confidence in government and rumors amongst international migrant workers involved in dormitory outbreaks of COVID-19: A cross-sectional survey
LUCAS: A highly accurate yet simple risk calculator that predicts survival of COVID-19 patients using rapid routine tests
Characterizing the COVID-19 illness experience to inform the study of post-acute sequelae and recovery: a qualitative study
SARS-CoV-2 spike T cell responses induced upon vaccination or infection remain robust against Omicron