Instruct: Identify the main category of the given Medrxiv paper based on its title.
Query: A randomized, controlled, feasibility study of RD-X19 in patients with mild-to-moderate COVID-19 in the outpatient setting
Six Month Safety and Efficacy of the BNT162b2 mRNA COVID-19 Vaccine
Post-acute sequelae of COVID-19 and adverse psychiatric outcomes: an etiology and risk systematic review protocol
"My friends would believe my word": appropriateness and acceptability of respondent-driven sampling in recruiting young tertiary student men who have sex with men for HIV/STI research in Nairobi, Kenya
Symptoms of common mental disorders and adherence to antiretroviral therapy among adults living with HIV in rural Zimbabwe: a cross-sectional study
Motor Neuron Disease is not clustered or associated with socioeconomic deprivation in Scotland.
Implementation of predictive risk stratification to reduce emergency admissions to hospital: experiences of general practitioners and practice managers
Socioeconomic inequality in the double burden of child malnutrition in the Eastern and Southern African Region
Identification of muscle weakness in older adults from normalized lower and upper limbs strength
Leveraging Northern European population history; novel low frequency variants for polycystic ovary syndrome
Structural disconnectome mapping of cognitive function in chronic stroke patients
"We just considered it  to be over there" : A qualitative study exploring urban perspectives for disease introduction
The Intrathecal Morphine for Percutaneous Endoscopic Lumbar Discectomy (IMPELD) Study: Rationale and Protocol for a Double-blinded Randomized Placebo-controlled Trial
Quickest Way to Less Headache Days: an operational research model and its implementation for Chronic Migraine
Adverse clinical outcomes in people at clinical high-risk for psychosis related to activity and glutamate function in the hippocampus.
A Quantitative Evaluation of COVID-19 Epidemiological Models
EARLY LENZILUMAB TREATMENT OF COVID-19 PATIENTS USING C-REACTIVE PROTEIN AS A BIOMARKER IMPROVES EFFICACY: RESULTS FROM THE PHASE 3 LIVE-AIR TRIAL
Absence of SARS-CoV-2 antibodies in pre-pandemic plasma from children and adults in Vietnam
The allometric propagation of COVID-19 is explained by human travel
Automated development of clinical prediction models enables real-time risk stratification with exemplar application to hypoxic-ischaemic encephalopathy
Method development and characterization of the low molecular weight peptidome of human wound fluids
Associations between residential exposure to volatile organic compounds (VOCs) and liver injury markers
A Multi-Stage Stochastic Programming Approach to Epidemic Resource Allocation with Equity Considerations
Smoking modulates different secretory subpopulations expressing SARS-CoV-2 entry genes in the nasal and bronchial airways
A Scoping Review of Community Based Geriatric Health Assessment and Screening Tools used in South Asia Region
The effects of modifiable maternal pregnancy risk factors on molar-incisor hypomineralisation: A negative control study