Instruct: Identify the main category of the given Medrxiv paper based on the title.
Query: Do antibody positive healthcare workers have lower SARS-CoV-2 infection rates than antibody negative healthcare workers? Large multi-centre prospective cohort study (the SIREN study), England: June to November 2020
Interferon Gamma Release Assays for Latent Mycobacterium tuberculosis Detection in Elderly Hispanics
Statin intolerance - Prevalence and practical management in a specialized lipid clinic
Learning longitudinal patterns and identifying subtypes of pediatric Crohn disease treated with infliximab via trajectory cluster analysis of electronic health records
Returning to nursing during the COVID-19 pandemic: experiences and needs of re-entering nurses
Analysis of humoral immunity against emerging SARS-CoV-2 variants: a population-based prevalence study in Yokohama, Japan
Apple Watch and Withings Evaluation of Symptoms, Treatment, and Rhythm in those Undergoing Cardioversion (AWE STRUCk): A Pragmatic Randomized Controlled Trial
Spatial equity of COVID-19 vaccination services in Aotearoa
Self-reported safety of the BBIBP-CorV (Sinopharm) COVID-19 vaccine among Iranian people with multiple sclerosis
Plasma Soluble Tumor Necrosis Factor Receptor Concentrations and Clinical Events after Hospitalization: Findings from ASSESS-AKI and ARID studies
Evaluation of a Rapid and Accessible RT-qPCR Approach for SARS-CoV-2 Variant of Concern Identification
Extended Invariant Information Clustering is Effective for Leave-One- Site-Out Cross-Validation in Resting State Functional Connectivity Modelling
Functional changes of visual cortex in pre- and post- operative intermittent exotropia patients: study protocol for a non-randomized case-control clinical trial
Real-world effectiveness of Ad26.COV2.S adenoviral vector vaccine for COVID-19
Methadone Distribution Increased from 2010 to 2019 for Opioid Use Disorder Treatment in the US
Using aggregate patient data at the bedside via an on-demand consultation service
Whole Genome Sequencing identifies novel structural variant in a large Indian family affected with X - linked agammaglobulinemia
A mixed methods study of community-based health insurance enrollment trends and underlying challenges in two districts of northeast Ethiopia: a proxy for its sustainability
Accuracy of Smartphone Integrated Pulse Oximetry Meets Full FDA Clearance Standards for Clinical Use.
Testing out of quarantine
The impact of Covid-19 vaccination on the Italian healthcare system: a scenario analysis
Smoking and subfertility: multivariable regression and Mendelian randomization analyses in the Norwegian Mother, Father and Child Cohort Study
Changes in lipids and inflammation in adults with super-refractory status epilepticus on a ketogenic diet
Expanding the genotype and phenotype spectrum of SYT1-associated neurodevelopmental disorder
Real-Time Semi-Automated and Automated Voxel Placement for Repeated Acquisition Magnetic Resonance Spectroscopy
Long-lasting neutralizing antibody responses in SARS-CoV-2 seropositive individuals are robustly boosted by immunization with the CoronaVac and BNT162b2 vaccines