Instruct: Identify the main category of the given Medrxiv paper based on its title.
Query: Mathematical modeling suggests pre-existing immunity to SARS-CoV-2
Antibody responses induced by trivalent inactivated influenza vaccine among pregnant and non-pregnant women in Thailand: a matched cohort study
Perceived Stress Among Faculty and First Year Students at a College of Pharmacy
Inequalities in access to paid sick leave among workers in England and Wales
Sex-specific associations between type 2 diabetes incidence and exposure to dioxin and dioxin-like pollutants: a meta-analysis
Regulatory T-cells are central hubs for age-, sex- and severity-associated cellular networks during COVID-19
Somatic mutation involving diverse genes leads to a spectrum of focal cortical malformations
Survival of health workers infected by SARS-CoV-2 in the context of vaccination against COVID-19 in Peru
Cohort profile: COVID-19 in a cohort of pregnant women and their descendants, the MOACC-19 study
Experience(s) of the medical profession: A qualitative study using narrative facilitators
Hospital profiling using Bayesian decision theory
Reports of myocarditis and pericarditis following mRNA COVID-19 vaccines: A review of spontaneously reported data from the UK, Europe, and the US
COVID-19 vaccination rates among health care workers by immigrant background. A nation-wide registry study from Norway.
Development of a core outcome set for multimorbidity trials in low- and middle-income countries (COSMOS): Study Protocol
Asymptomatic SARS-CoV-2 infection by age: A systematic review and meta-analysis
Effects of Acute Normovolemic Hemodilution on Post-Cardiopulmonary Bypass Coagulation Tests and Allogeneic Blood Transfusion in Thoracic Aortic Repair Surgery: An Observational Cohort Study
Genomic epidemiology and longitudinal sampling of ward wastewater environments and patients reveals complexity of the transmission dynamics of blaKPC-carbapenemase-producing Enterobacterales in a hospital setting
Evidence for feasibility of mobile health and social media-based interventions for early psychosis and clinical high risk
Human behaviour, NPI and mobility reduction effects on COVID-19 transmission in different countries of the world
Development and performance of a population-based risk stratification model for COVID-19
Characterizing Affective Variability in Bipolar Disorder and Borderline Personality Disorder, and the Effects of Lithium, Using a Generative Model of Affect
Impacts of school closures on physical and mental health of children and young people: a systematic review
Tocilizumab and mortality in hospitalised patients with covid-19. A systematic review comparing randomised trials with observational studies
Immunogenicity and Safety of the inactivated SARS-CorV-2 vaccine (BBIBP-CoV) in patients with malignancy
The effect of including the Nordic Hamstring exercise on sprint and jump performance in athletes: protocol of a systematic review and meta-analyses
Survival analysis of all critically ill patients with COVID-19 admitted to the main hospital in Mogadishu, Somalia, 30 March to 12 June 2020: what interventions are proving effective?