Instruct: Identify the main category of the given Medrxiv paper based on the title.
Query: The mystery of COVID-19 reinfections: A global systematic review and meta-analysis of 577 cases
Low SARS-CoV-2 infection rate and high vaccine-induced immunity among German healthcare workers at the end of the third wave of the COVID-19 pandemic
Impact on Mental Health of students due to restriction caused by COVID-19 pandemic: Cross-sectional study
Healthy longevity from incidence-based models: More kinds of health than stars in the sky
Novel blood test for early biomarkers of preeclampsia and Alzheimer's disease
Body fat volumes and distribution in chronic schizophrenia compared to healthy controls; a cross-sectional MR study
Vaccine efficacy for COVID-19 outbreak in New York City
Exploring the Temporal Dynamics of County-Level Vulnerability Factors on COVID-19 Outcomes
Cell graph neural networks enable digital staging of tumour microenvironment and precisely predict patient survival in gastric cancer
The genetic background of hydrocephalus in a population-based cohort: implication of ciliary involvement
Evaluation of a speech-based AI system for early detection of Alzheimer's disease remotely via smartphones
Predicting the time course of replacements of SARS-CoV-2 variants using relative reproduction numbers
Risk perception of COVID-19 and its socioeconomic correlates in the United States: A social media analysis
Patients' satisfaction and quality of clinical laboratory services provision at public health facilities in northeast Ethiopia
Neutrophils and triglycerides predict critical illness in COVID-19 and reveal CDK6 inhibitors as potential preventive treatment
Loss of Y in leukocytes as a risk factor for critical COVID-19 in men
Public Opinion about the UK Government during COVID-19 and Implications for Public Health: A Topic Modelling Analysis of Open-Ended Survey Response Data
Global epidemiology of SARS-CoV-2 infection: a systematic review and meta-analysis of standardized population-based seroprevalence studies, Jan 2020-Dec 2021
Genetic control of fetal placental genomics contributes to development of health and disease
Concentration of SARS-CoV-2 from large volumes of raw wastewater is enhanced with the inuvai R180 system
DIRC3-IGFBP5 is a shared genetic risk locus and therapeutic target for carpal tunnel syndrome and trigger finger
Image-based computational hemodynamics analysis of systolic obstruction in hypertrophic cardiomyopathy
Three decades of hospital evacuations in the Netherlands: a scoping review
KLF3 and PAX6 are candidate driver genes in late-stage, MSI-hypermutated endometrioid endometrial carcinomas
COVID-19 vaccine uptake among older people in relation to sociodemographic factors: cohort results from southern Sweden
Regional pleural strain measurements during mechanical ventilation using ultrasound elastography: A randomised, crossover, proof of concept physiologic study