Instruct: Identify the main category of the given Medrxiv paper based on its title.
Query: Long-term immunogenicity of BNT162b2 vaccination in the elderly and in younger health care workers
Breakthrough infections with the omicron and delta variants of SARS-CoV-2 result in similar re-activation of vaccine-induced immunity
Physician Reimbursement and Retention in HIV Care: Racial Disparities in the US South
Genetic regulation of OAS1 nonsense-mediated decay underlies association with risk of severe COVID-19
Racial and ethnic disparities in maternal mental health during COVID-19
Huntington's Disease Integrated Staging System (HD-ISS): A Novel Evidence-Based Classification System For Staging
Determining the cutoff points of the 5C scale for assessment of COVID-19 vaccines psychological antecedents among the Arab population: A multinational study
Contribution of Schools to Covid-19 Pandemic: Evidence from Czechia
Addressing anti-syncytin antibody levels, and fertility and breastfeeding concerns, following BNT162B2 COVID-19 mRNA vaccination
Post-stroke executive function in relation to white matter damage on clinically acquired CT brain imaging
Retrospective Exploratory Analysis of Task-Specific Effects on Brain Activity after Stroke
Combining machine learning and mathematical models of disease dynamics to guide development of novel disease interventions
Inferring the multiplicity of founder variants initiating HIV-1 infection: a systematic review and individual patient data meta-analysis
Vascular Comorbidities Worsen Prognosis of Patients with Heart Failure Hospitalized with COVID-19
The Macroscopic Growth Laws of Brain Metastases
Estimates of Cross-Border Menthol Cigarette Sales Following the Comprehensive Tobacco Flavor Ban in Massachusetts
Description of a community paediatric strategy offering a package of services to prevent malnutrition among children in one health district in Mali
The causal effect of serum vitamin D concentration on COVID-19 susceptibility, severity and hospitalization traits: a Mendelian randomization study
Modelling the impact of non-pharmaceutical interventions on workplace transmission of SARS-CoV-2 in the home-delivery sector
Dementia is strongly associated with medial temporal atrophy even after accounting for neuropathologies
Street images classification according to COVID-19 risk in Lima, Peru: A convolutional neural networks analysis
Dementia and hearing-aid use: a two-way street
Validation of Genomic and Transcriptomic Models of Homologous Recombination Deficiency in a Real-World Pan-Cancer Cohort
Re-emergence of Invasive Pneumococcal Disease in Germany during the Spring and Summer of 2021
Shotgun mass spectrometry-based lipid profiling identifies and distinguishes between chronic inflammatory diseases
Increased variance in second electrode accuracy during deep brain stimulation and its relationship to pneumocephalus, brain shift, and clinical outcomes: a retrospective cohort study.