Instruct: Identify the main category of the given medRxiv paper based on its title.
Query: Theoretical framework for retrospective studies of the effectiveness of SARS-CoV-2 vaccines
Patients with benign breast disease and breast cancer need more COVID-19 vaccines
A systematic review and meta-analysis on the safety and efficacy of tocilizumab in the management of COVID-19
Optimal and worst examination strategies for COVID-19
Development of machine learning models for the prediction of complications after colorectal and small intestine surgery in psychiatric and non-psychiatric patient collectives (P-Study)
Assessment of AUC and fold change for precision medicine
Group testing: revisiting the ideas
Clinical validity of single-gene non-invasive prenatal testing for sickle cell disease and beta thalassemia
Influenza A H1N1 mediated pre-existing immunity to SARS-CoV-2 predicts COVID-19 outbreak dynamics
A comparison of four commercially available RNA extraction kits for wastewater surveillance of SARS-CoV-2 in a college population
Speech cortical activation and connectivity in typically developing children and those with listening difficulties
The final blink: intact cerebellar associative learning in isolated dystonia
Impacts of COVID-19 on sick leave
Longitudinal and comparative analysis of humoral response upon COVID-19 vaccination
Methadone Distribution Increased from 2010 to 2019 for Opioid Use Disorder Treatment in the US
Risk of SARS-CoV-2 exposure among hospital healthcare workers in relation to patient contact and type of care
Mitochondria-targeted antioxidant supplementation augments acute exercise-induced increases in muscle PGC1α mRNA and improves training-induced increases in peak power independent of mitochondrial content and function in untrained middle-aged men
Mendelian randomization analysis identifies blood tyrosine levels as a biomarker of non-alcoholic fatty liver disease
The primary care annual dementia review: a qualitative study of the views and experiences of service users and providers
Low levels of Fe and Se with high IL-6/IL-10 likely influence nutritional immunity in tuberculosis patients.
Quantifying the potential for dominant spread of SARS-CoV-2 variant B.1.351 in the United States
The COVID-19 pandemic shifted the Veterans Affairs System toward being a payer and virtual care provider: is it sustainable?
The contribution of evolutionary game theory to understanding and treating cancer
SARS-CoV-2 antibodies remain detectable 12 months after infection and antibody magnitude is associated with age and COVID-19 severity
The reactogenicity and immunogenicity of a booster dose after the second dose of a protein subunit vaccine MVC-COV1901: An extension to an open-label, dose-escalation, and non-randomized phase 1 study
Modeling and reviewing analysis of the COVID-19 epidemic in Algeria with diagnostic shadow