Instruct: Identify the main category of the given Medrxiv paper based on its title.
Query: Booster dose of BNT162b2 in a CoronaVac primary vaccination protocol improves neutralization of SARS-CoV-2 Omicron variant
Clinical and Virological Features of Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) Variants in Vaccinated and Unvaccinated Patients in Mexico City
Indirect impacts of the COVID-19 pandemic at two tertiary neonatal units in Zimbabwe and Malawi: an interrupted time series analysis
Superspreading of SARS-CoV-2 infections: A Systematic Review and Meta-analysis
Longitudinal trends and risk factors for depressed mood among Canadian adults during the first wave of COVID-19
Genome-wide contribution of common short-tandem repeats to Parkinson's disease genetic risk
Emergence of an early SARS-CoV-2 epidemic in the United States
Integrating primary care and social services for older adults with multimorbidity: A qualitative study
Coffee, smoking and aspirin are associated with age at onset and clinical severity in idiopathic Parkinson's disease
Virtual Trials: Causally-validated treatment effects efficiently learned from an observational cancer registry
A more compact photoacoustic imaging system to detect periodontitis
Replication of LZTFL1 gene region as a susceptibility locus for COVID-19 in Latvian population.
The impact of policy timing on the spread of COVID-19
Transferability of Psychological Interventions from Disaster-Exposed Employees to Healthcare Workers Working during the COVID-19 Pandemic
Parental preferences for a mandatory vaccination scheme in England; a discrete choice experiment
Virtual Delivery of Simulation Education to Undergraduate Medical Students During the COVID-19 Pandemic
REPEATABILITY OF A DIGITAL IMAGING TECHNOLOGY FOR DENTAL PLAQUE QUANTITATION (QRAYCAM PRO) IN CURRENT, FORMER AND NEVER SMOKERS STUDY PROTOCOL
Differential expression of genes influencing mitotic processes in cord blood mononuclear cells after a pre-conceptional micronutrient-based randomized controlled trial: Pune Rural Intervention in Young Adolescents (PRIYA)
Impact of national and regional lockdowns on COVID-19 epidemic waves: Application to the 2020 spring wave in France
Estimation of the basic reproduction number of COVID-19 from the incubation period distribution
Novel deep learning algorithm predicts the status of molecular pathways and key mutations in colorectal cancer from routine histology images
Case Series of Thrombosis with Thrombocytopenia Syndrome following COVID-19 vaccination--United States, December 2020-August 2021
Validation of motor and functional scales for the evaluation of adult patients with 5q spinal muscular atrophy
Detection and quantification of enteric pathogens in aerosols near open wastewater canals in cities with poor sanitation
Defining the role of asymptomatic and pre-symptomatic SARS-CoV-2 transmission: a living systematic review
Higher case fatality rate among obstetric patients with COVID-19 in the second year of pandemic in Brazil: do new genetic variants play a role?