Instruct: Identify the main category of the given Medrxiv paper based on its title.
Query: COVID-19 Projections for K12 Schools in Fall 2021: Significant Transmission without Interventions
Use of medicinal plants for COVID-19 prevention and respiratory symptom treatment during the pandemic in Cusco, Peru: A cross-sectional survey
A systematic review of observational methods used to quantify personal protective behaviours among members of the public during the COVID-19 pandemic, and the concordance between observational and self-report measures in infectious disease health protection
Investigating causal relations between sleep duration and risks of adverse pregnancy and perinatal outcomes: Linear and nonlinear Mendelian randomization analyses in up to 356,069 European women
Endometrium receptivity and the dose-related effects of Acupuncture therapies in infertile women: a protocol for systematic review and meta analysis
Analysis of alternative Covid-19 mitigation measures in school classrooms: an agent-based model of SARS-CoV-2 transmission
Effectiveness of Covishield vaccine in preventing Covid-19 -- A test-negative case-control study
Immunity acquired by a minority active fraction of the population could explain COVID-19 spread in Greater Buenos Aires (June-November 2020)
The economic value of quarantine is higher at lower case prevalence, with quarantine justified at lower risk of infection
Living with Children and Adults' Risk of COVID-19: Observational Study
Disentangling "Bayesian brain" theories of autism spectrum disorder
Modelling, Simulations and Analysis ofthe First and Second COVID-19 Epidemics in Beijing
Digital gait biomarkers, but not clinical ataxia scores, allow to capture 1-year longitudinal change in Spinocerebellar ataxia type 3 (SCA3)
Safely return to schools and offices: early and frequent screening with high sensitivity antigen tests effectively identifies COVID-19 patients
Heart rate and heart rate variability in patients with chronic inflammatory joint disease: The role of pain duration and the insular cortex
Resting-state EEG distinguishes depression in Parkinson's disease
Intrahost evolution of the HIV-2 capsid correlates with progression to AIDS
The impact of school closures on adolescent health-related outcomes during the COVID-19 pandemic: A natural experiment in South Korea
Urine extracellular vesicles capture kidney transcriptome and hyperglycemia linked mRNA signatures for type 1 diabetic kidney disease
Analysis of Mutational Profile of Hypopharyngeal and Laryngeal Head and Neck Cancers Identifies KMT2C as a Potential Tumor Suppressor
Investigation and public health response to a COVID-19 outbreak in a rural resort community--Blaine County, Idaho, 2020
Modelled Optimization of SARS-Cov-2 Vaccine Distribution: an Evaluation of Second Dose Deferral Spacing of 6, 12, and 24 weeks
Joint associations between objectively measured physical activity volume and intensity with body-fatness. The Fenland Study.
HIV and the Seroprevalence of SARS-CoV-2
Efficacy of premarital genotype screening and counselling on knowledge toward Sickle Cell disease among university students in Dodoma Tanzania: uncotrolled quasi-experimental study
Alcohol intake and hypertensive disorders of pregnancy: a negative control analysis in the ALSPAC cohort