Instruct: Identify the main category of the given Medrxiv paper based on the title.
Query: Time-Varying Mortality Risk Suggests Increased Impact of Thrombosis in Hospitalized Covid-19 Patients
Resource Allocation for Different Types of Vaccines against COVID-19: Tradeoffs and Synergies between Efficacy and Reach
Disrupted Ca2+ homeostasis and immunodeficiency in patients with functional Inositol 1,4,5-trisphosphate receptor subtype 3 defects
Effectiveness of COVID-19 vaccines against the Omicron (B.1.1.529) variant of concern
Maliqua: A study within Malakit, a project on malaria and gold miners in French Guiana
High COVID-19 vaccine coverage allows for a re-opening of European universities
Mutations that confer resistance to broadly-neutralizing antibodies define HIV-1 variants of transmitting mothers from that of non-transmitting mothers
A semi-parametric, state-space compartmental model with time-dependent parameters for forecasting COVID-19 cases, hospitalizations, and deaths
Relationship Between Patient Sex and Serum Tumor Necrosis Factor Antagonist Drug and Anti-Drug Antibody Concentrations in Inflammatory Bowel Disease; A Nationwide Cohort Study
Image- vs. histogram-based considerations in semantic segmentation of pulmonary hyperpolarized gas images
The Coronavirus Calendar (CoronaCal): a Simplified SARS-CoV-2 Test System for Sampling and Retrospective Analysis
The drug development pipeline for glioblastoma - a cross sectional assessment of the FDA Orphan Drug Product designation database
Knowledge, Attitude, and Practices of Health Professionals Working in A Major Health Care System Regarding Social Determinants of Health (SDOH) and Community Health Workers (CHWs)
Progress, stasis, and regression through the hypertension care continuum: Longitudinal evidence from population-based cohort data in four populous middle-income countries
Co-circulation of two viral populations under vaccination
OCT2Hist: Non-Invasive Virtual Biopsy Using Optical Coherence Tomography
Reference values and validation of the 1-min sit-to-stand test in healthy 5- to 16-year-old youth
COVID-19 testing in schools: Perspectives of school administrators, teachers, parents, and students in Southern California
Factors Associated with Serious Psychological Distress during the COVID-19 Pandemic in Japan
A general computational framework for COVID-19 modelling, with applications to testing varied interventions in education environments
Change in vaccine willingness in Australia: August 2020 to January 2021
Hyperglycemia in Acute COVID-19 is Characterized by Adipose Tissue Dysfunction and Insulin Resistance
Vaccine effectiveness against SARS-CoV-2 transmission to household contacts during dominanceof Delta variant (B.1.617.2), August-September 2021, the Netherlands
COVID-19 vaccination status is associated with physical activity in German-speaking countries: the COR-PHYS-Q cohort study
Massive social protests amid the pandemic in selected  Colombian  cities:  Did  they increase COVID-19 cases?
ASSESSING VACCINATION STRATEGIES FOR THE COVID-19 EPIDEMIC IN MINAS GERAIS (BRAZIL)