Instruct: Identify the main category of the given Medrxiv paper based on its title.
Query: Estimating the effectiveness of the Pfizer COVID-19 BNT162b2 vaccine after a single dose. A reanalysis of a study of 'real-world' vaccination outcomes from Israel.
Risk factors for severe COVID-19 in hospitalized children in Canada: A national prospective study from March 2020--May 2021
The late positive potentials evoked by negative emotional pictures predict autonomic responses to an acute psychosocial stressor in healthy adults
Population Age-Ineligible for COVID-19 Vaccine in the United States: Implications for State, County, and Race/Ethnicity Vaccination Targets
Use and impact of virtual primary care on quality and safety: public perspectives during the COVID-19 pandemic
COVID-19 Vaccine Acceptance and Hesitancy in Low and Middle Income Countries, and Implications for Messaging
Stronger Microstructural Damage Revealed in Multiple Sclerosis Lesions with Central Vein Sign by Quantitative Gradient Echo MRI
Attitudes and Experiences Surrounding Female Genital Mutilation/Cutting in the United States: A Scoping Review
Automatic Electrophysiological Noise Reduction and Epileptic Seizure Detection for Stereoelectroencephalography
Comparisons of the risk of myopericarditis between COVID-19 patients and individuals receiving COVID-19 vaccines: a population-based study
Polygenic associations and causal inferences between serum immunoglobulins and amyotrophic lateral sclerosis
Adherence of SARS-CoV-2 delta variant to surgical mask and N95 respirators
Implementation of COVID-19 Preventive Measures in Primary and Secondary Schools Following Reopening of Schools in Autumn 2020; A Cross-Sectional Study of Parents' and Teachers' Experiences in England
Rare PSAP variants and possible interaction with GBA in REM sleep behavior disorder
The Statistical Monitoring by Adaptive RMSTD Tests: an efficient, informative, and customizable method for the complete internal quality control intended for low-frequent sampling of control measures
Validation of Genomic and Transcriptomic Models of Homologous Recombination Deficiency in a Real-World Pan-Cancer Cohort
Association between the physical work environment and work functioning impairment while working from home under the COVID-19 pandemic in Japanese workers
Age- and gender-dependent differences in attitudes towards COVID-19 vaccination and underlying psychological processes
Privacy Risks of Whole-Slide Image Sharing in Digital Pathology
A phylogeny-aware GWAS framework to correct for heritable pathogen effects on infectious disease traits
Improved evaluation of left ventricular hypertrophy using the spatial QRS-T angle by electrocardiography
Intraocular water movement visualization using 1H-MRI with eye drops of O-17 labeled saline: a first-in-human study
Effectiveness of Financial Incentives for a Pedometer-Based Walking Promotion Program
Towards personalized rTMS in tinnitus: reliability of individualized stimulation protocols in behavioral and electrophysiological responses
Vaccine hesitancy for coronavirus SARS-CoV-2 in North India
Worries about COVID-19 infection and psychological distress at work and while commuting