Instruct: Identify the main category of the given medRxiv paper based on its title.
Query: SARS-CoV-2 infection and transmission in school settings during the second wave in Berlin, Germany: a cross-sectional study
Projecting the impact of SARS-CoV-2 variants on the COVID-19 epidemic and social restoration in the United States: a mathematical modelling study
The comparison of vaccine hesitancy of COVID-19 vaccination in China and the United States
Dopamine D1 agonist effects in late-stage Parkinson's disease
Prospective evaluation of ID NOW COVID-19 assay used as point-of-care test in an Emergency Department
IFIH1 rs1990760 variants, systemic inflammation and outcome in critically-ill COVID-19 patients
Machine Learning Enabled Non-invasive Diagnosis of Nonalcoholic Fatty Liver Disease and Assessment of Abdominal Fat from MRI Data
SARS-CoV-2 Heterogeneity by Ethnicity in Los Angeles
Susceptibility of zero community transmission regimes to new variants of SARS-CoV-2: a modelling study of Queensland
Continued Effectiveness of COVID-19 Vaccination among Urban Healthcare Workers during Delta Variant Predominance
Changing patterns in reporting and sharing of review data in systematic reviews with meta-analysis: the REPRISE project
The innate and adaptive immune landscape of SARS-CoV-2-associated Multisystem Inflammatory Syndrome in Children (MIS-C) from acute disease to recovery.
Computed Tomography Radiomics Signatures: Sensitive biomarkers for clinical decision support in pancreatic cancer- a pilot study
Nicotinamide riboside improves muscle mitochondrial biogenesis, satellite cell differentiation and gut microbiota composition in a twin study
Non-muscle Invasive Bladder Cancer Molecular Subtypes Predict Differential Response to Intravesical Bacillus Calmette-Guerin
Development and validation of a deep learning algorithm based on fundus photographs for estimating the CAIDE dementia risk score
The Effects of Pericapsular nerve group (PENG) block on Postoperative Recovery in Elderly Patients with Hip fracture: a study protocol for randomized, parallel controlled, double-blind trial
Environmental monitoring and health assessment in an industrial town in central India: A cross-sectional study protocol
Theory of Mind and Moral Decision-Making in the Context of Autism Spectrum Disorder
Mortality in COVID-19 amongst women on Hormone Replacement Therapy or Combined Oral Contraception: A cohort study
Temporal trends in hospitalizations and 30-day mortality in older patients during the COVID pandemic from March 2020 to July 2021
COVID-19 International Border Surveillance Cohort Study at Toronto's Pearson Airport
Acute kidney injury in patients with non-valvular atrial fibrillation treated with rivaroxaban or warfarin: a population-based study from the United Kingdom
In-person schooling and associated COVID-19 risk in the United States over Spring Semester 2021
Endogenous interferon-beta but not interferon-alpha or interferon-lambda levels in upper respiratory tract predict clinical outcome in critical COVID-19 patients independent of viral load
Comparison of procedures performed and costs between an outsourced dental health plan with fee-for-service payment and an evidence-based, in-house dental health service with salaried professionals.