Instruct: Identify the main category of the given medRxiv paper based on its title.
Query: Breakthrough Covid-19 infections during periods of circulating Beta, Delta and Omicron variants of concern, among health care workers in the Sisonke Ad26.COV2.S vaccine trial, South Africa
Shedding of Infectious SARS-CoV-2 Despite Vaccination
Toward a preventive approach to prolonged grief disorder in palliative care: Insecure attachment moderates the impact of perceived support on the severity of symptoms
Estimating the total morbidity burden of COVID-19
Multifocal vascular affection in a patient with angina pectoris - rationale and design of a clinical study
Systematic single-variant and gene-based association testing of 3,700 phenotypes in 281,850 UK Biobank exomes
Percentage of reported Covid-19 cases in Colombia: Estimating the true scale of the pandemic
Impact of vaccination on the COVID-19 pandemic: Evidence from U.S. states
Polygenic risk vectors (PRV) improve genetic risk stratification for cardio-metabolic diseases
Evaluating a polygenic hazard score to predict risk of developing metastatic or fatal prostate cancer in the multi-ancestry Million Veteran Program cohort
Knowledge and aptitude of early childhood, primary and/or secondary education teachers referred to first aid measures in dental trauma in the province of Seville (Spain.)
Monocytic Subsets and Their Signature Genes Differentially Impact Cortex and Cognition in First-Episode Schizophrenia
Simultaneous Monitoring of Disease and Microbe Dynamics Through Plasma DNA Sequencing in Pediatric Patients with Acute Lymphoblastic Leukemia
A Comparative Study on the knowledge and attitude of COVID-19 among Urban and Rural populations of Bangladesh.
Attention Deficit and Hyperactivity Disorder and Enuresis co-occurrence in the pediatric population: a systematic review and meta-analysis
Space-time Classification Index for Assessing COVID-19 Hotspots
Fractality of Tics as a Quantitative Assessment Tool for Diagnosis of Tourette Syndrome
A STUDY OF ETIOLOGICAL AND CLINICAL PROFILE OF PATIENTS WITH LMN CRANIAL NERVE PALSY IN A TERTIARY CARE CENTER AT THANJAVUR MEDICAL COLLEGE AND HOSPITAL
A case-control study of autoimmune AEFIs following COVID-19 vaccination reported to VAERS
A tale of three SARS-CoV-2 variants with independently acquired P681H mutations in New York State
The "Trauma Pitch": How stigma emerges for Iraq and Afghanistan veterans seeking disability compensation
A2B-COVID: A method for evaluating potential SARS-CoV-2 transmission events
Delineating the heterogeneity of preimplantation development via unsupervised clustering of embryo candidates for transfer using automated, accurate and standardized morphokinetic annotation
Quarantine and testing strategies to reduce transmission risk from imported SARS-CoV-2 infections: a global modelling study
Post-viral mental health sequelae: Systematic review and meta-analysis of prevalence proportions
#AstraZeneca vaccine disinformation on Twitter