Instruct: Identify the main category of the given Medrxiv paper based on its title.
Query: Systematic Testing for SARS-CoV-2 Infection Among Essential Workers in Montreal, Canada: A Prospective Observational and Cost Assessment Study
Targeting TGF-b pathway with COVID-19 Drug Candidate ARTIVeda/PulmoHeal Accelerates Recovery from Mild-Moderate COVID-19
Patient symptoms and experience following COVID-19: results from a UK wide survey
Anaphylactic events in mRNA vaccines: a reporting case-control study
The influence of genetic predisposition and physical activity on risk of Gestational Diabetes Mellitus in the nuMoM2b cohort
Mouth-rinses and SARS-CoV-2 viral load in saliva: A living systematic review
Post-tuberculosis sequelae and their correlation with quality of life: An observational study at a tertiary care center of north India
Conceptualizing centers of excellence: A global evidence
Accurate Covid-19 prevalence measurement in the field
ExPheWas: a browser for gene-based pheWAS associations
Development and validation of a questionnaire to measure attitudes toward COVID-19 vaccination and pandemic
Higher Limbic and Basal Ganglia volumes in surviving COVID-negative patients and the relations to fatigue.
Two Distinct Dynamic Process Models of COVID-19 Spread with Divergent Vaccination Outcomes
COVID-19 vaccination and menstrual cycle changes: A United Kingdom (UK) retrospective case-control study
Health-care workers in gastrointestinal endoscopy are at higher risk for SARS-CoV-2 infection compared to other aerosol-generating disciplines
Immunogenicity of SARS-CoV-2 Vaccine in Dialysis
The impact of ongoing COVID-19 lockdown on family finances and mental health
Mortality of care home residents and community-dwelling controls during the covid-19 pandemic in 2020: matched cohort study
Health-Related Quality of Life and psychological distress of adolescents during the COVID-19 pandemic in Geneva
Indian Interventional trials for COVID-19 drugs: Insights and Learnings
Identification and application of plasmatic microRNA expression quantitative trait loci (miR-QTL) at first trimester of pregnancy
Validation of AI-based software for objectification of conjunctival provocation test results in routine examinations and clinical studies
Associations of insomnia on pregnancy and perinatal outcomes: Findings from Mendelian randomization and conventional observational studies in up to 356,069 women
Immunity acquired by a minority active fraction of the population could explain COVID-19 spread in Greater Buenos Aires (June-November 2020)
Gender Based Differences in Risks and Comorbidities in Patients Hospitalized with Acute Exacerbation of COPD: A Retrospective Observational study in Eastern-Nepal
Development and use analysis of 'gestioemocional.cat', a web app for promoting emotional self-care and access to professional mental health resources during the covid-19 pandemic