Instruct: Identify the main category of the given Medrxiv paper based on its title.
Query: Pre-existing antibodies targeting a linear epitope on SARS-CoV-2 S2 cross-reacted with commensal gut bacteria and shaped vaccine induced immunity
Design and implementation of an international, multi-arm, multi-stage platform master protocol for trials of novel SARS-CoV-2 antiviral agents: Therapeutics for Inpatients with COVID-19 (TICO/ACTIV-3)
Longitudinal SARS-CoV-2 seroprevalence in a rural and urban community household cohort in South Africa, during the first and second waves July 2020-March 2021
Treatment of sarcoidosis with cutaneous involvement with tofacitinib
Impact of early life nutrition on gut health in children: A prospective clinical study
Post-Mendelian genetic model in COVID-19
Taiwan on track to end third COVID-19 community outbreak
Urinary metabolic biomarkers of diet quality in European children are associated with metabolic health
National Population-Level Disparities in COVID-19 Mortality Across the Intersection of Race/Ethnicity and Sex in the United States
Long-term psychological consequences of long Covid: a propensity score matching analysis comparing trajectories of depression and anxiety symptoms before and after contracting long Covid vs short Covid
Clinical Decision Support in Cardiovascular Medicine: Effectiveness, Implementation Barriers, and Regulation
Place of preperitoneal pelvic packing in severe pelvic traumatisms: About 20 cases performed in a French military level one trauma center
Validation of the new pathology staging system for progressive supranuclear palsy
Genetic regulation of serum IgA levels and susceptibility to common immune, infectious, kidney, and cardio-metabolic traits
A meta-analysis of the genome-wide association studies on two genetically correlated phenotypes (self-reported headache and self-reported migraine) identifies four new risk loci for headaches (N=397,385)
Evaluating the potential of respiratory-sinus-arrhythmia biofeedback for reducing physiological stress in adolescents with autism: a protocol for a randomized controlled study
Novel risk factors for Coronavirus disease-associated mucormycosis (CAM): a case control study during the outbreak in India
Epidemiological topology data analysis links severe COVID-19 to RAAS andhyperlipidemia associated metabolic syndrome conditions
Covasim: an agent-based model of COVID-19 dynamics and interventions
NEURONAL AND ASTROCYTIC TETRAPLOIDY IS INCREASED IN DRUG-RESISTANT EPILEPSY
Seroprevalence of anti-SARS-CoV-2 antibodies in women attending antenatal care in eastern Ethiopia
A Simple Mathematical Tool to Help Distribute Doses of Two-Dose Covid-19 Vaccines among Non-Immunized and Partly-Immunized Population
Depression, Anxiety and Stress among the Patient of Chronic Kidney Disease at Nadiad Gujarat, A Cross sectional study
Problems with Evidence Assessment in COVID-19 Health Policy Impact Evaluation (PEACHPIE): A systematic review of study design and evidence strength
Electronic early notification of sepsis in hospitalized ward patients: a study protocol for a stepped-wedge cluster randomized controlled trial
Latent classes of mens intimate partner violence perpetration and attitudes towards gender norms: a UN multi-country, cross-sectional study in Asia and the Pacific