Instruct: Identify the main category of the given Medrxiv paper based on the title.
Query: COVID-19 trends and severity among symptomatic children aged 0 to 17 years in ten EU countries, 3 August 2020 to 3 October 2021
COVID-19 deaths and hospitalizations averted by rapid vaccination rollout in the United States
Does COVID-19 vaccination improve mental health? A difference-in-difference analysis of the Understanding Coronavirus in America study
Genomic epidemiology of the SARS-CoV-2 epidemic in Zimbabwe: Role of international travel and regional migration in spread
From "don, doff, and discard" to "don, doff, and decontaminate" - determination of filtering facepiece respirator and surgical mask integrity and inactivation of a SARS-CoV-2 surrogate and a small non-enveloped virus following multiple-cycles of vaporised hydrogen peroxide, ultraviolet germicidal irradiation, and dry heat decontamination
Persistence, prevalence, and polymorphism of sequelae after COVID-19 in young adults
The treatment of scaphoid non-unions with partial and total scaphoid in titanium custom-made 3D-printed prostheses and reconstruction of scapholunate interosseous ligament: a preliminary study
Waning of SARS-CoV-2 booster viral-load reduction effectiveness
Monoclonal Antibody Treatment of Breakthrough COVID-19 in Fully Vaccinated Individuals with High-Risk Comorbidities
Swab-Seq: A high-throughput platform for massively scaled up SARS-CoV-2 testing
Mental Health During COVID-19: A Qualitative Study with Ethnically Diverse Healthcare Workers in the United Kingdom
Uptake of infant and pre-school immunisations in Scotland and England during the COVID-19 pandemic: an observational study of routinely collected data
Improving the quality of anthropometric measures during medical consultations with children aged under five years old in Burkina Faso
LncRNAs NEAT1 and MALAT1 Differentiate Inflammation in Severe COVID-19 Patients
Development of machine learning models for the prediction of complications after colorectal and small intestine surgery in psychiatric and non-psychiatric patient collectives (P-Study)
Exhaled SARS-CoV-2 quantified by face-mask sampling in hospitalised patients with covid-19
Leveraging of SARS-CoV-2 PCR cycle thresholds values (Ct) to forecast COVID-19 trends
Short-term effects of BNT162b2 mRNA COVID-19 vaccination on physiological measures: a prospective study
Multi-organ complement deposition in COVID-19 patients
Corpus callosum structural characteristics in very preterm children and adolescents: developmental trajectory and relationship to cognitive functioning
Monoclonal Antibody Treatment, Prophylaxis and Vaccines Combined to Reduce SARS CoV-2 Spread
Spike protein antibodies mediate the apparent correlation between SARS-CoV-2 nucleocapsid antibodies and neutralization test results
Role of non-aerosols activities in the transmission of SARS-Cov-2 infection among health care workers.
Ulcerative Colitis Host-Microbiome Response to Hyperbaric Oxygen Therapy
Evaluating the effects of an intervention to improve the health environment for mothers and children in health centres (BECEYA) in Mali: a qualitative study
Socio-economic deprivation and cancer incidence in England: Quantifying the role of smoking