Instruct: Identify the main category of the given Medrxiv paper based on its title.
Query: A two-stage super learner for healthcare expenditures
Health impact and cost-effectiveness of COVID-19 vaccination in Sindh Province, Pakistan
Estimated durations of asymptomatic, symptomatic, and care-seeking phases of tuberculosis disease
How is the distribution of psychological distress changing over time? Who is driving these changes? Analysis of the 1958 and 1970 British birth cohorts.
Immune responses following 3rd and 4th doses of heterologous and homologous COVID-19 vaccines in kidney transplant recipients
Cash Transfer Programs and HIV-Related Outcomes: an Analysis of 42 Countries from 1996 to 2019
Prioritizing COVID-19 vaccination efforts and dose allocation within Madagascar
Independent morphological variables correlate with Aging, Mild Cognitive Impairment, and Alzheimer's Disease
SARS-CoV2 serology assays: utility and limits of different antigen based tests through the evaluation and the comparison of four commercial tests
Effectiveness of the CoronaVac vaccine in the elderly population during a P.1 variant-associated epidemic of COVID-19 in Brazil: A test-negative case-control study
Chronic Disease and Workforce Participation Among Medicaid Enrollees Over 50: The Potential Impact of Medicaid Work Requirements Post-COVID-19
Abdominal Imaging Associates Body Composition with COVID-19 Severity
Study protocol for an inception cohort investigating possible predictors of systemic steroids effectiveness in treatment of acute sciatic pain
Are fast test results preferable to high test sensitivity in contact-tracing strategies?
Survey of residential indoor Particulate Matter measurements 1990-2019
Estimation of local time-varying reproduction numbers in noisy surveillance data
Three-dose mRNA-1273 vaccination schedule: sufficient antibody response in majority of immunocompromised hematology patients
Antibody response and intra-host viral evolution after plasma therapy in COVID-19 patients pre-exposed or not to B-cell depleting agents
Pregnancy loss and postpartum mortality in a sub-Saharan African setting
Short-chain fatty acid concentrations in the incidence and risk-stratification of colorectal cancer: a systematic review and meta-analysis
RNA expression classifiers from a model of breast epithelial cell organization to predict pathological complete response in triple negative breast cancer
Estimation of stroke outcomes based on time to thrombolysis and thrombectomy
Social inequalities in COVID-19 vaccine acceptance and uptake for children and adolescents in Montreal, Canada: a cross-sectional study
Predictors of poor outcome in patients diagnosed with drug-resistant tuberculosis in the Torres Strait / Papua New Guinea border region
A Novel Smart City Based Framework on Perspectives for application of Machine Learning in combatting COVID-19
Sustained high prevalence of COVID-19 deaths from a systematic post-mortem study in Lusaka, Zambia: one year later