Instruct: Identify the main category of the given Medrxiv paper based on its title.
Query: Vaccine effectiveness of Pfizer-BioNTech and Oxford-AstraZeneca to prevent severe COVID-19 in Costa Rica by September and October 2021: A nationwide, observational study of hospitalisations prevalence.
Modeling the Effect of Population-Wide Vaccination on the Evolution of COVID-19 Epidemic in Canada
Signatures of mast cell activation are associated with severe COVID-19
An AI-assisted Online Tool for Cognitive Impairment Detection Using Images from the Clock Drawing Test
Sex differences in TB treatment outcomes: Retrospective cohort study and meta-analysis
Socioeconomic Status and COVID-19 Related Outcomes in India: Hospital Based Study
The 1968 Influenza Pandemic and COVID-19 Outcomes
Polymorphism in IFNAR contributes to glucocorticoid response and outcome in ARDS and COVID-19
Risk Factors for Klebsiella infections among hospitalized patients with Pre-Existing Colonization
The interplay of policy, behavior, and socioeconomic conditions in early COVID-19 epidemiology in Georgia
UV-C irradiation is highly effective in inactivating SARS-CoV-2 replication
CuNA: Cumulant-based Network Analysis of genotype-phenotype associations in Parkinson's Disease
Trends in National Opioid Prescribing for Dental Procedures among Medicaid Patients
The long-term impact of vaginal surgical mesh devices in UK primary care: a cohort study in the CPRD
Biomarkers Selection for Population Normalization in SARS-CoV-2 Wastewater-based Epidemiology
Identifiability and Predictability of Integer- and Fractional-Order Epidemiological Models Using Physics-Informed Neural Networks
COVID-19 vaccine response in people with multiple sclerosis
The plasmablast response to SARS-CoV-2 mRNA vaccination is dominated by non-neutralizing antibodies that target both the NTD and the RBD
Optimal intervention strategies for minimizing total incidence during an epidemic
12-lead Electrocardiogram in Hospitalized COVID 19 Patients
Evaluation of a speech-based AI system for early detection of Alzheimer's disease remotely via smartphones
SARS-CoV-2 detection and genomic sequencing from hospital surface samples collected at UC Davis
COVID-19 among bartenders and waiters before and after pub lockdown
Anti-spike antibody response to natural SARS-CoV-2 infection in the general population
Critically ill COVID-19 status associated trait genetics reveals CDK6 inhibitors as potential treatment
Comparison of Antibody Response Durability of mRNA-1273, BNT162b2, and Ad26.COV2.S SARS-CoV-2 Vaccines in Healthcare Workers