Instruct: Identify the main category of the given medRxiv paper based on its title.
Query: SARS-CoV-2 variants of concern Alpha and Delta show increased viral load in saliva
Immunological dysfunction persists for 8 months following initial mild-moderate SARS-CoV-2 infection
Low-Dose Naltrexone/Acetaminophen Combinations and Each Component in the Acute Treatment of Migraine: Findings of a Small, Randomized, Double-Blind, and Placebo-Controlled Clinical Trial
Face masks to prevent transmission of respiratory diseases: Systematic review and meta-analysis of randomized controlled trials
Genetic risk and incident venous thromboembolism in middle-aged and older adults following 1 Covid-19 vaccination
Effect of evidence updates on key determinants of measles vaccination impact: a DynaMICE modelling study in ten high-burden countries
Patient experience with healthcare: Feedback for a Post COVID-19 clinic at a tertiary care center in rural area
Prominent Spatiotemporal Waves of COVID-19 Incidence in the United States: Implications for Causality, Forecasting, and Control
Protocol for 18F-PSMA PET imaging in staging and management of prostate cancer - a retrospective cohort study
The impact of retracted randomised controlled trials on systematic reviews and clinical practice guidelines: a meta-epidemiological study
Factors predicting serum clozapine levels in Middle Eastern patients
The evolution of knowledge on genes associated with human diseases
Household COVID-19 risk and in-person schooling
Seroresponse to SARS-CoV-2 vaccines among maintenance dialysis patients
Psilocybin modulation of dynamic functional connectivity is associated with plasma psilocin and subjective effects
Preventing childhood obesity primary schools: a realist review from UK perspective
Integrative genomic analyses in adipocytes implicate DNA methylation in human obesity and diabetes
WiFi mobility models for COVID-19 enable less burdensome and more localized interventions for university campuses
Chronic Disease and Workforce Participation Among Medicaid Enrollees Over 50: The Potential Impact of Medicaid Work Requirements Post-COVID-19
Mass Homicide by Firearm in Canada: Effects of Legislation
An 8-DNA methylation signature predicts recurrence risk of cervical cancer
Response to the coronavirus disease 2019 (COVID-19) pandemic at private retail pharmacies in Kenya: a mixed methods study
Stress-induced change in salience network coupling prospectively predicts trauma-related symptoms.
Mortality during the COVID-19 pandemic: findings from the CLINIMEX exercise cohort in the year of 2020
Detection of M. tuberculosis in the environment as a tool for identifying high-risk locations for tuberculosis transmission
Social, demographic and behavioural determinants of SARS-CoV-2 infection: A case-control study carried out during mass community testing of asymptomatic individuals in South Wales, December 2020