Instruct: Identify the main category of the given Medrxiv paper based on its title.
Query: Comparative effectiveness of ChAdOx1 versus BNT162b2 vaccines against SARS-CoV-2 infections in England and Wales: A cohort analysis using trial emulation in the Virus Watch community data
Spatial patterns of excess mortality in the first year of the COVID-19 pandemic in Germany
Deep Neural Survival Networks for Cardiovascular Risk Prediction: The Multi-Ethnic Study of Atherosclerosis (MESA)
Mass Homicide by Firearm in Canada: Effects of Legislation
INCIDENCE OF HEPATITIS B AND C VIRUSES AMONG THE SCAVENGERS IN KWARA STATE, NIGERIA
Effectiveness of Covid-19 vaccines against SARS-CoV-2 Omicron variant (B.1.1.529): A systematic review with meta-analysis and meta-regression
The role of childrens vaccination for COVID-19 - Pareto-optimal allocations of vaccines
COVID-19 Associated Mucormycosis: Scoping Review Protocol
CLINICAL MANIFESTATIONS AND DIAGNOSIS OF CO-INFECTION OF COVID-19, TUBERCULOSIS AND OPPORTUNISTIC PULMONARY INFECTIONS IN LATE-STAGE HIV PATIENTS WITH IMMUNODEFICIENCY
Polygenic risk for psychiatric disorder reveals distinct association profiles across social behaviour in the general population
The impact of the COVID-19 pandemic on children with medical complexity
Genetic variation of IFNL4 is associated with COVID-19
'We don't routinely check vaccination background in adults': a national qualitative study of barriers and facilitators to vaccine delivery and uptake in adult migrants through UK primary care
Comparison of dried blood spots and venous blood for the detection of SARS-CoV-2 antibodies in a population of nursing home residents
The impact of COVID-19 pandemic on AMI and Stroke mortality in Lombardy: Evidence from the epicenter of the pandemic
Machine learning detects SARS-CoV-2 and variants rapidly on DNA aptamer metasurfaces
Mendelian randomization analysis identifies blood tyrosine levels as a biomarker of non-alcoholic fatty liver disease
Effects of Diabetes and Blood Glucose on COVID-19 Mortality: A Retrospective Observational Study
Loss-of-function of MFGE8 and protection against coronary atherosclerosis
Anti-inflammatory therapy with nebulised dornase alfa in patients with severe COVID-19 pneumonia
Association of COVID-19 vaccination with risks of hospitalization and mortality due to cardiovascular and other diseases: A study of the UK Biobank
Fear among Syrians: a Proposed Cutoff Score and Validation of the Arabic Fear of COVID-19 Scale- A National Survey
Pediatric Croup during the COVID-19 Omicron Variant Surge
CAR-T cells Targeting Thyroid-stimulating Hormone Receptor (TSHR) Demonstrate Safety and Potent Preclinical Activity Against Differentiated Thyroid Cancer
The impact of the UK's first COVID-19 lockdown on rates of violence and aggression on psychiatric inpatient wards
SCALP HIGH FREQUENCY OSCILLATION RATE DEPENDS ON SLEEP STAGE AND DECREASES WITH TIME SPENT IN SLEEP