Instruct: Identify the main category of the given medRxiv paper based on its title.
Query: COVID-19 vaccines effectiveness against symptomatic SARS-CoV-2 Delta variant infection: a population-based case-control study in St. Petersburg, Russia
COVCOG 1: Factors predicting Cognitive Symptoms in Long COVID. A First Publication from the COVID and Cognition Study.
COVID-19 outcomes associated with clinical and demographic characteristics in patients hospitalized with severe and critical disease in Peshawar
Seroconversion panels demonstrate anti-SARS-CoV-2 antibody development after administration of the mRNA-1273 vaccine
Using body temperature and variables commonly available in the EHR to predict acute infection: A proof-of-concept study showing improved pretest probability estimates for acute COVID-19 infection among discharged emergency department patients
Arabic validation and cross-cultural adaptation of the 5C scale for assessment of COVID-19 vaccines psychological antecedents
SARS-CoV-2 antibody prevalence in Sierra Leone, March 2021: a cross-sectional, nationally representative, age-stratified serosurvey
Pay-it-forward to improve influenza vaccine uptake and public engagement among children and older adults in China: three-arm quasi-experimental pragmatic trial
The impact of health literacy-sensitive design and heart age in a cardiovascular disease prevention decision aid: randomised controlled trial and end user testing
Risk of plague transmission from human cadavers: a systematic review
Effect of Vaccination on Household Transmission of SARS-CoV-2 Delta VOC
Rapid Clinical Screening and Staging for COVID-19 Severe Outcome
Plasma S1P links to hypertension and biomarkers of inflammation, metabolism and cardiovascular disease - findings from a translational investigation
Evaluation of commercially available high-throughput SARS-CoV-2 serological assays for serosurveillance and related applications
The sensitivity improved two-test algorithm "SIT2": a universal optimization strategy for SARSAQ-CoV-2 serology
A SARS-CoV-2 Delta Variant Containing Mutation in the Probe Binding Region Used for qRT-PCR Test in Japan Exhibited Atypical PCR Amplification and Might Induce False Negative Result
(SARS-CoV-2) COVID 19: Genomic surveillance and evaluation of the impact on the population speaker of indigenous language in Mexico
Twenty years review of probiotic meta-analyses articles: Effects on disease prevention and treatment
A versatile, fast and unbiased method for estimation of gene-by-environment interaction effects on biobank-scale datasets
Epigenetic aging and perceived psychological stress in old age
Rapid initiation of nasal saline irrigation to reduce morbidity and mortality in COVID+ outpatients: a randomized clinical trial compared to a national dataset
Functional connectome mediates the association between sleep disturbance and mental health in preadolescence
Testing Frequency Matters | An Evaluation of the Diagnostic Performance of a SARS-CoV-2 Rapid Antigen Test in United States Correctional Facilities
Optimizing multi-domain hematologic biomarkers and clinical features for the differential diagnosis of unipolar depression and bipolar depression
Vascular risk is not associated with PET measures of Alzheimer's disease neuropathology among cognitively normal older adults
Broad neutralization of SARS-CoV-2 variants, including omicron, following breakthrough infection with delta in COVID-19 vaccinated individuals