Instruct: Identify the main category of the given Medrxiv paper based on its title.
Query: Varicella outbreak at a nursery school under routine immunization
Factors associated with nonessential workplace attendance during the Covid-19 pandemic in the UK in early 2021: evidence from cross-sectional surveys
Perceived barriers and enablers influencing physical activity in heart failure: a qualitative one-to-one interview study
Development and validation of a cardiovascular diseases risk prediction model for Chinese males (CVDMCM)
Photoacoustic monitoring of angiogenesis predicts response to therapy in healing wounds
PROMIS scales for assessment of the impact of post-COVID syndrome: A Cross-Sectional Study
Interventions targeting nonsymptomatic cases can be important to prevent local outbreaks: SARS-CoV-2 as a case-study
Modeling the effect of vaccination strategies in an Excel spreadsheet: The rate of vaccination, and not only the vaccination coverage, is a determinant for containing COVID-19 in urban areas
Evaluating a polygenic hazard score to predict risk of developing metastatic or fatal prostate cancer in the multi-ancestry Million Veteran Program cohort
Is trait mindfulness associated with lower pain reactivity and connectivity of the default mode network? A replication and extension study in healthy and episodic migraine participants
A novel biomechanical injury risk score demonstrates correlation with lower limb posterior chain injury in fifty elite level rugby union athletes
A systematic review and meta-analysis of Anakinra, Sarilumab, Siltuximab and Tocilizumab for Covid-19
A Scaling Law for PCR Positivity in the COVID Second Wave
Exploring the clinical consequences and genetic aetiology of adult weight trajectories
Epigenome-wide contributions to individual differences in childhood phenotypes: A GREML approach
Mortality reduction in ICU-admitted COVID-19 patients in Suriname after treatment with convalescent plasma acquired via gravity filtration
Interplay of ADHD polygenic liability with birth-related, somatic and psychosocial factors in ADHD - a nationwide study
Blood transcriptional biomarkers of acute viral infection for detection of pre-symptomatic SARS-CoV 2 infection
Effect of Eight-Week Online Cognitive Training in Parkinson's Disease: A Randomized Controlled Trial
The impact of the first wave of COVID-19 on those with lifelong conditions: a case study of congenital heart disease
The SENSOR System: Using Standardized Data Entry and Dashboards for Review of Scientific Studies Using the Clinical Applications of Psychedelics as an Illustration
Tau Imaging with 18F-MK6240 across the Alzheimer's Disease spectrum
Diagnostic Utility of Antigen Detection Rapid Diagnostic Tests for Covid- 19: A Systematic Review and Meta-Analysis
SEVERE COVID-19 IS MARKED BY DYSREGULATED SERUM LEVELS OF CARBOXYPEPTIDASE A3 AND SEROTONIN
Evaluation of a speech-based AI system for early detection of Alzheimer's disease remotely via smartphones
Altered cerebellar oscillations in Parkinson's disease patients during cognitive and motor tasks