Instruct: Identify the main category of the given Medrxiv paper based on its title.
Query: Heart Rate Variability as a Prospective Predictor of Early COVID-19 Symptoms
Cardiovascular Risk Factors and Outcomes in COVID-19: Hospital-Based Prospective Study in India
Modeling the impact of COVID-19 vaccination in Lebanon: A call to speed-up vaccine roll out
A spectrum of HRCT chest findings in RT-PCR positive asymptomatic COVID-19 patients at a COVID designated hospital in Nepal
Longitudinal assessment of diagnostic test performance over the course of acute SARS-CoV-2 infection
Genetic variants associated with cross-disorder and disorder-specific risk for psychiatric disorders are enriched at epigenetically active sites in peripheral lymphoid cells
The Effect of Increasing Women's Autonomy on Primary and Repeated Caesarean Sections in Brazil
Forecasting the Spreading Trajectory of the COVID-19 Pandemic
Increased incidence of thrombosis in a cohort of cancer patients with COVID-19
Epigenome-wide association study of human frontal cortex identifies differential methylation in Lewy body pathology
Alzheimer's disease variant portal (ADVP): a catalog of genetic findings for Alzheimer's disease
Grandfathers and Grandsons: Social Security Expansion and Child Health in China
DETECTION OF ITALIAN NURSES' THOUGHTS ON SEXUAL HEALTH AND THEIR KNOWLEDGE ON THE HIV-TRANSMISSION: A WEB SURVEY.
An atlas of trait associations with resting-state and task-evoked human brain functional architectures in the UK Biobank
Multivariate Modeling of Direct and Proxy GWAS Indicates Substantial Common Variant Heritability of Alzheimer's Disease
Monitoring real-time transmission heterogeneity from Incidence data
Biallelic truncation variants in ATP9A are associated with a novel autosomal recessive neurodevelopmental disorder
Breakthrough SARS-CoV-2 Infection Outcomes in Vaccinated Patients with Chronic Liver Disease and Cirrhosis: A National COVID Cohort Collaborative Study
Public Health Impact of the Pfizer-BioNTech COVID-19 vaccine (BNT162b2) in the first year of rollout in the United States
Long term antibody response to SARS-CoV-2 in children
Burden of Post-COVID-19 Syndrome and Implications for Healthcare Service Planning: A Population-based Cohort Study
SARS-CoV-2 antibody persistence after five and twelve months: A cohort study from South-Eastern Norway
A systematic review and meta-analysis of non-workplace interventions to reduce time spent sedentary in adults
The lost microbes of COVID-19: Bifidobacterium, Faecalibacterium depletion and decreased microbiome diversity associated with SARS-CoV-2 infection severity
An intermediate effect size variant in UMOD confers risk for chronic kidney disease
An LDLR missense variant poses high risk of familial hypercholesterolemia in 30% of Greenlanders and offers potential for early cardiovascular disease intervention