Instruct: Identify the main category of a Medrxiv paper based on its title.
Query: SARS-CoV-2 variants of concern, Gamma (P.1) and Delta (B.1.617), sensitive detection and quantification in wastewater employing direct RT-qPCR
Comparison of accelerometry-based measures of physical activity
The Omicron variant mutation at position 28,311 in the SARS-CoV-2 N gene does not perturb CDC N1 target detection
Amplitude-integrated EEG amplitudes differ between wakefulness and sleep states in children
Stable Sparse Classifiers predict cognitive impairment from gait patterns
Coronary collaterals not visible by invasive angiography can provide more than half of normal resting perfusion in patients with coronary artery disease
Quantitative SARS-CoV-2 anti-spike responses to Pfizer-BioNTech and Oxford-AstraZeneca vaccines by previous infection status
Impaired sensory evidence accumulation and network function in Lewy body dementia
Effect of a single dose of oral iron on pancreatic beta-cell function in healthy individuals: a before-and-after (pre-post) study
Development and validation of a clinical and genetic model for predicting risk of severe COVID-19
Estimating VO2peak in 18-91 year-old adults: Development and validation of the FitMax - Questionnaire
The genomic and transcriptional landscape of primary central nervous system lymphoma
A cross-sectional study of the mismatch between telecommuting preference and frequency associated with psychological distress among Japanese workers in the COVID-19 pandemic
Evaluation of sample collection and transport strategies to enhance yield, accessibility, and biosafety of COVID-19 RT-PCR testing
Penetrance and Pleiotropy of Polygenic Risk Scores for Schizophrenia, Bipolar Disorder, and Depression in the VA Health Care System
Rare variants in IFFO1, DTNB and NLRC3 associate with Alzheimer's disease CSF profile of neuronal injury and inflammation
Short time effect of Covid 19 pandemic on HbA1c and acute metabolic complications in children with type 1 diabetes
Patients with presumed tuberculosis in sub-Saharan Africa that are not diagnosed with tuberculosis: a systematic review and meta-analysis
Meta-analytical evidence on mental disorder symptoms during the COVID-19 pandemic in Latin America
Temporal trends, socio-economic inequalities in obesity and responses by federal government, Nepal: a systematic review of observational studies, policies, strategies and plans, 2005-2019
Hidden Parameters impacting resurgence of SARS-CoV-2 Pandemic
Normative cognitive scores in western India, stratified by age, rurality, cognitive domains, and psychiatric comorbidity.
Should the governance of individual treatment attempts (''Individuelle Heilversuche	'') include praxis evaluation? Results from qualitative stakeholder interviews.
Long-term and low-level envelope C2V3 stimulation from highly diverse virus isolates leads to frequent development of broad and elite antibody neutralization in HIV-1 infected individuals
Early and rapid identification of COVID-19 patients with neutralizing type I-interferon auto-antibodies by an easily implementable algorithm
Details of "conversion therapy" practices and concordance with legislative definition: Findings from a non-probability community-based survey in Canada, 2020