Instruct: Identify the main category of the given Medrxiv paper based on the title.
Query: The BioNTech / Pfizer vaccine BNT162b2 induces class-switched SARS-CoV-2-specific plasma cells and potential memory B cells as well as IgG and IgA serum and IgG saliva antibodies upon the first immunization
Faecal shedding models for SARS-CoV-2 RNA amongst hospitalised patients and implications for wastewater-based epidemiology
The fomite contribution to the transmission of COVID-19 in the UK: an evolutionary population estimate
SARS-CoV-2 testing and COVID-19 related primary care use among people with citizenship, permanent residency, and temporary immigration status in British Columbia: Cross-sectional analysis of population-based administrative data
Contamination of air and surfaces in workplaces with SARS-CoV-2 virus: a systematic review
Long-term outcome of corneal collagen crosslinking with riboflavin and UV-A irradiation for keratoconus
XGBoost, a novel explainable AI technique, in the prediction of myocardial infarction, a UK Biobank cohort study
Risk factors for SARS-CoV-2 infection and hospitalisation in children and adolescents in Norway: A nationwide population-based study.
Democratic governance and excess mortality during the COVID-19 pandemic
New and Increasing Rates of Adverse Events Can be Found in Unstructured Text in Electronic Health Records using the Shakespeare Method
Using Mendelian randomisation to explore the gateway hypothesis: Possible causal effects of smoking initiation and alcohol consumption on substance use outcomes
Accessing Medical Care for Infertility: A Study of Women in Mexico
The impact of vaccinating adolescents and children on COVID-19 disease outcomes
COVID-19 risk assessment for the Tokyo Olympic Games
Impact of SARS-CoV-2 Vaccines on Covid-19 Incidence and Mortality in the United States
Vaccination is Australia's most important COVID-19 public health action, even though herd immunity is unlikely
Lung Perfusion Disturbances Detected with MRI in Non-Hospitalized Post-COVID-19 Individuals with Dyspnea 3 -13 Months after the Acute Disease
Poor in-utero growth, and reduced beta cell compensation and high fasting glucose from childhood, are harbingers of glucose intolerance in young Indians
Impact of non-pharmacological interventions on COVID-19 boosting vaccine prioritization and vaccine-induced herd immunity: a population-stratified modelling study
Motor Unit Number Index (MUNIX) of the Upper Trapezius: Reliability and Meta-Analysis
Proteogenomic analysis identifies the persistence of targetable lesions and proteomes through disease evolution in pediatric acute lymphoblastic leukemia
Comparing the performance of risk stratification scores in Brugada syndrome: a multi-centre study
Longitudinal Changes of Cardiac and Aortic Imaging Phenotypes Following COVID-19 in the UK Biobank Cohort
Estimating the incidence and key risk factors of cardiovascular disease in patients at high risk of imminent fracture using routinely collected real-world data from the UK
Improved screening of COVID-19 cases through a Bayesian network symptoms model and psychophysical olfactory test
Low frequency interictal EEG biomarker for localizing seizures