Instruct: Identify the main category of the given medRxiv paper based on the title.
Query: Exploring overcrowding trends in an inner city emergence department in the UK before and during COVID-19 epidemic
DNR orders in SARS-CoV-2 patients: a retrospective validation study in a Swiss COVID-19 Center
Inflammaging in Major Depressive Disorder: Associations between markers of inflammation and brain ageing in depression across two large community-based cohorts
Risk factors for bacterial infections in patients with moderate to severe COVID-19: A case control study
Estimating the incidence of typhoidal Salmonella from cross-sectional serology using antibody dynamics following infection
On mobility trends analysis of COVID-19 dissemination in Mexico City
DunedinPACE: A DNA methylation biomarker of the Pace of Aging
Outbreak of COVID-19 among vaccinated and unvaccinated homeless shelter residents- Sonoma County, California, July 2021
Local SARS-CoV-2 peptide-specific Immune Responses in Lungs of Convalescent and Uninfected Human Subjects
MRI Intensity Standardization Evaluation Design for Head and Neck Quantitative Imaging Applications
Acceptance of COVID 19 vaccine among sub-Sahara African (SSA): a comparative study of residents and diaspora dwellers
Exposing Limitations of Clinical Laboratory Tests in COVID-19 and the Promise of Immunological Biomarkers
Controlling the pandemic during the SARS-CoV-2 vaccination rollout: a modeling study
Characterizing cerebral metabolite profiles in anorexia and bulimia nervosa and their associations with habitual behavior
Impaired Humoral Immunity to SARS-CoV-2 Vaccination in Non-Hodgkin Lymphoma and CLL Patients
COVID-19 Related Chemosensory Changes in Individuals with Self-Reported Obesity
COVID Testing in the Workplace: Return to Work Testing in an Occupational Cohort
Leptospira infection in rural areas of Uraba region, Colombia: a prospective study
Pediatric Diarrhea Patients Living in Urban Areas Have Higher Incidence of Clostridioides difficile Infection
Analysis of 6.4 million SARS-CoV-2 genomes identifies mutations associated with fitness
Healthy diets, lifestyle changes and wellbeing during and after lockdown: Longitudinal evidence from the West Midlands
Meditation practice, mindfulness and pain-related outcomes in mindfulness-based treatment for episodic migraine
Impacts of school closures on physical and mental health of children and young people: a systematic review
Financial Incentives and Healthcare Provision: Evidence from an Experimental Aedes aegypti Control Programme in Brazil
Comparing survival in urinary tract cancer patients with various second primary malignancies: A population-based study
Saving Lives with Pre-Financed Rules-Based Disaster Aid: Evidence from Mexico