Instruct: Identify the main category of the given medRxiv paper based on its title.
Query: Serological testing reveals the hidden COVID-19 burden among healthcare workers experiencing a SARS-CoV-2 nosocomial outbreak.
COVID-19 propagation by diffusion - a two-dimensional approach for Germany
COVID-19 vaccination and Guillain-Barre syndrome: analyses using the National Immunoglobulin Database
Comparing Sexual Network Mean Active Degree Measurement Metrics among Men who have Sex with Men
Lead-OR: A Multimodal Platform for Deep Brain Stimulation Surgery
Age reporting in the Brazilian COVID-19 vaccination database: What can we learn from it?
Predicting sex, age, general cognition and mental health with machine learning on brain structural connectomes
Effect of prior infection, vaccination, and hybrid immunity against symptomatic BA.1 and BA.2 Omicron infections and severe COVID-19 in Qatar
Pediatric Croup during the COVID-19 Omicron Variant Surge
Sufficient strategies for travel quarantine and testing
Clinical presentation and in-hospital outcomes of older patients hospitalized with COVID-19 in Montreal, Canada: a retrospective review
Occurrence and transmission potential of asymptomatic and presymptomatic SARS-CoV-2 infections: update of a living systematic review and meta-analysis
COVID-19 in Japan: insights from the first three months of the epidemic
Prognostic association supports indexing size measures in echocardiography by body surface area
Risk factors for infection, predictors of severe disease and antibody response to COVID-19 in patients with rheumatic diseases in Portugal - a multicentre, nationwide study
The effect of galvanic vestibular stimulation on postural balance in Parkinsons Disease: A systematic review and meta-analysis
Microsimulation of SARS-CoV-2 Transmission in Society
Prospective SARS-CoV-2 cohort study among general practitioners during the second COVID-19 wave in Flanders, Belgium
Pharmaceutical Payments to Japanese Certificated Hematologists: A Retrospective Analysis of Personal Payments from Pharmaceutical Companies between 2016 and 2019
A2B-COVID: A method for evaluating potential SARS-CoV-2 transmission events
The Impact of Mask-Wearing in Mitigating the Spread of COVID-19 During the Early Phases of the Pandemic
Impact of the COVID-19 pandemic on mental healthcare consultations among children and adolescents in Norway: a nationwide registry study
Inflammasome-related markers at the ICU admission are not associated with outcome in the critically ill COVID-19 patients.
Presence of Major Depressive Disorder influences both neuropsychiatric symptoms and the cognitive profile in Mild Cognitive impairment and Alzheimers disease
Risk factors for workplace bullying, severe psychological distress, and suicidal ideation during the COVID-19 pandemic: a nationwide internet survey for the general working population in Japan
Genetic and environmental regulation of caudate nucleus transcriptome: insight into schizophrenia risk and the dopamine system