Instruct: Identify the main category of the given Medrxiv paper based on its title.
Query: Higher mortality associated with the SARS-CoV-2 Delta variant in the Western Cape, South Africa, using RdRp target delay as a proxy
Diagnostic accuracy of a novel SARS-CoV-2 antigen-detecting rapid diagnostic test from standardized self-collected anterior nasal swabs
Comparative effectiveness of ChAdOx1 versus BNT162b2 COVID-19 vaccines in Health and Social Care workers in England: a cohort study using OpenSAFELY
Are We There Yet? Big Data Significantly Overestimates COVID-19 Vaccination in the US
Psychosocial and Behavioral Responses and SARS-CoV-2 Transmission Prevention Behaviors while Working during the COVID-19 Pandemic
From raw data to a score: Comparing quantitative methods that construct multi-level composite implementation strength scores of family planning programs in Malawi
Short-term Outcomes in Children Recovered from Multisystem Inflammatory Syndrome associated with SARS-CoV-2 infection
Characteristics of Patients Referred to a Cardiovascular Disease Clinic for Post-Acute Sequelae of SARS-CoV-2 Infection
COVID-19 & Mental Health: Impact on Working people and Students
Primary Care for Homeless Veterans: A Systematic Review of the Homeless Patient Aligned Care Team (HPACT)
Inference of SARS-CoV-2 generation times using UK household data
Sex differences in opioid and psychostimulant craving and relapse: a critical review
Densely sampled viral trajectories for SARS-CoV-2 variants alpha (B.1.1.7) and epsilon (B.1.429)
Right Ventricular Dysfunction in Ventilated Patients with COVID-19 (COVID-RV)
Cost-effectiveness of polygenic risk profiling for primary open-angle glaucoma in the United Kingdom and Australia
Screening for Atrial Fibrillation in Older Adults at Primary Care Visits: the VITAL-AF Randomized Controlled Trial
Differential Effects of Pathological Beta Burst Dynamics Between Parkinson's Disease Phenotypes Across Different Movements
Covid-19 and Excess Mortality in Medicare Beneficiaries
Retrospective Methodology to Estimate Daily Infections from Deaths (REMEDID) in COVID-19: the Spain case study
Racial differences in white matter hyperintensity burden in aging, MCI, and AD
Early introduction and rise of the Omicron SARS-CoV-2 variant in highly vaccinated university populations
Three decades of hospital evacuations in the Netherlands: a scoping review
Association between mobility, non-pharmaceutical interventions, and COVID-19 transmission in Ghana: a modelling study using mobile phone data
Health Provider and Sexual and Gender Minority Service User Perspectives on Provision of Mental Health Services During the Early Phase of the COVID-19 Pandemic in British Columbia, Canada
Investigation of clinical characteristics and genome associations in the UK Lipoedema cohort
VIKING II, a Worldwide Observational Cohort of Volunteers with Northern Isles Ancestry