Instruct: Identify the main category of the given Medrxiv paper based on the title.
Query: Vaccine hesitancy and anti-vaccination attitudes during the start of COVID-19 vaccination program: a content analysis on Twitter data
Access to COVID-19 Vaccines in High-, Middle-, and Low-Income Countries Hosting Clinical Trials
Sex-specific differences in resting-state functional brain activity in pediatric concussion.
The online delivery of exercise oncology classes supported with health coaching: A pilot randomized controlled trial
Variation in the reporting of elective surgeries and its influence on patient safety indicators
Fallow time determination in dentistry using aerosol measurement.
SARS-CoV-2 seroprevalence in children, parents and school personnel from June 2020 to April 2021: cohort study of 55 schools in Switzerland
The impact of Mendelian sleep and circadian genetic variants in a population setting
Categorizing ultra-processed food intake in large-scale cohort studies: evidence from the Nurses' Health Studies, the Health Professionals Follow-Up Study, and the Growing Up Today Study
Successful incorporation of a genetic risk prediction research platform into routine newborn screening
Dexamethasone 12 mg versus 6 mg for patients with COVID-19 and severe hypoxia: an international, randomized, blinded trial
Modified Oxacillin Resistant Staphylococcus aureus detected in neonatal intensive care patients
Towards Optimum Reporting of Pulmonary Effectiveness Databases and Outcomes (TORPEDO): identifying a core dataset for asthma and COPD studies
The impact of real-time whole genome sequencing in controlling healthcare-associated SARS-CoV-2 outbreaks
The impact of heating, ventilation, and air conditioning design features on the transmission of viruses, including the 2019 novel coronavirus: a systematic review of filtration
Maternal Urinary Phthalate Metabolites are Associated with Lipidomic Signatures Among Pregnant Women in Puerto Rico
Analysis of cutoff point estimation for determining seropositivity in the context of SARS-CoV-2 infections
Anti-inflammatory therapy with nebulised dornase alfa in patients with severe COVID-19 pneumonia
Model-based Evaluation of Continued COVID-19 Risk at Long Term Care Facilities
A SARS-CoV-2 variant of concern triggers Fc effector function with increased cross-reactivity
SEED: Symptom Extraction from English Social Media Posts using Deep Learning and Transfer Learning
Causal Inference and COVID-19 Nursing Home Patients: Identifying Factors That Reduced Mortality Risk
COVID-19 Test Positivity Rate as a marker for hospital overload
Derivation and external validation of a simple risk score to predict in-hospital mortality in patients hospitalized for COVID-19
COVID-19 Outcomes Among Users of CD20 Inhibitors for Immune-Mediated Diseases: A Comparative Cohort Study
Modelling the impact of contact tracing of symptomatic individuals on the COVID-19 epidemic