Instruct: Identify the main category of the given Medrxiv paper based on its title.
Query: Cerebral venous thrombosis and portal vein thrombosis: a retrospective cohort study of 537,913 COVID-19 cases
Risk factors, early presentations, and clinical markers of Parkinson's disease in Primary Care in a diverse UK population
Gestational SARS-CoV-2 infection is associated with placental expression of immune and trophoblast genes
Systemic cytokines and GlycA discriminate inflammaging, disease progression and corticosteroid response in HTLV-1-associated neuroinflammation
Community-Based Phenotypic Study of Safety, Tolerability, Reactogenicity and Immunogenicity of Emergency-Use-Authorized Vaccines Against COVID-19 and Viral Shedding Potential of Post-Vaccination Infections: Protocol for a prospective study
Dynamic of humoral response to SARS-CoV-2 anti Nucleocapsid and Spike proteins after CoronaVac vaccination
Estimating SARS-CoV-2 variant strain infectiousness in Japan as of March 28, 2021
Two doses of the mRNA BNT162b2 vaccine reduce severe outcomes, viral load and secondary attack rate: evidence from a SARS-CoV-2 Alpha outbreak in a nursing home, Osnabrueck, Germany, January-March 2021
Genetic evidence supports the development of SLC26A9 targeting therapies for the treatment of lung disease
Factors preventing SARS-CoV-2 transmission during unintentional exposure in a GP practice: a cohort study of patient contacts; Germany, 2020
Neurophobia: A study of Australian medical students and junior doctors
Impaired Lymphocyte Responses in Pediatric Sepsis Vary by Pathogen Type
A Retrospective Analysis of Feeding Practices and Complications in Patients with Critical Bronchiolitis on Non-invasive Respiratory Support
Impact of different diagnostic measures on drug class association with dementia progression risk: a longitudinal prospective cohort study
Estimation of age-stratified contact rates during the COVID-19 pandemic using a novel inference algorithm
Higher education responses to COVID-19 in the United States: Evidence for the impacts of university policy
Local Exhaust Ventilation to Control Dental Aerosols and Droplets
The statistical analysis of daily data associated with different parameters of the New Coronavirus COVID-19 pandemic in Georgia and their monthly interval prediction from September 1, 2021 to December 31, 2021
Longitudinal analyses of depression and anxiety highlight greater prevalence during COVID-19 lockdowns in the Dutch general population and a continuing increase in suicidal ideation in young adults
Molecular epidemiology of SARS-CoV-2 - a regional to global perspective
Remdesivir to treat COVID-19: can dosing be optimized?
Sars-Cov-2 antibody titer 3 months post-vaccination is affected by age, gender, smoking and vitamin D.
Hearing aids reduce daily-life fatigue and increase social activity: a longitudinal study
False-Negative Mitigation in Group Testing for COVID-19 Screening
Multi-type branching and graph product theory of infectious disease outbreaks
Conditionality of COVID-19 vaccine acceptance in European countries