Instruct: Identify the main category of the given Medrxiv paper based on the title.
Query: Stairway visual contrast enhancement to reduce fall-related events
Effects of midfoot joint mobilization on perceived ankle-foot function in chronic ankle instability. A crossover clinical trial.
Healthcare workers benefit from second dose of COVID-19 mRNA vaccine: Effects of partial and full vaccination on sick leave duration and symptoms
Concentration of SARS-CoV-2 from large volumes of raw wastewater is enhanced with the inuvai R180 system
A Match Made in Cyberspace: Applicant Perspectives on Virtual Residency Interviews
International impact of large multi-centre surgical trials of arthroscopic subacromial decompression
Diagnostic performance and clinical implications of rapid SARS-CoV-2 antigen testing in Mexico using real-world nationwide COVID-19 registry data
SARS-CoV-2 seroprevalence in asymptomatic or mild symptomatic people and symptomatic patients with negative PCR results: The hidden perspective in epidemiological reports
Altered anterior default mode network dynamics in progressive multiple sclerosis
Informal Sector Employment and the Health Outcomes of Older Workers in India
Primary school staff perspectives of school closures due to COVID-19, experiences of schools reopening and recommendations for the future: a qualitative survey in Wales
Public Covid-19 X-ray datasets and their impact on model bias - a systematic review of a significant problem
Excess years of life lost to COVID-19 and other causes of death by sex, neighbourhood deprivation and region in England & Wales during 2020
Rising Through the Pandemic: A scoping review of quality improvement in public health during the COVID-19 pandemic
Cardiovascular disease and all-cause mortality risk prediction from abdominal CT using deep learning
Correlations between kidney and heart function bioindicators and the expressions of Toll-Like, ACE2, and NRP-1 receptors in COVID-19
Sequencing SARS-CoV-2 in Slovakia: An Unofficial Genomic Surveillance Report
Low SARS-CoV-2 infection rate and high vaccine-induced immunity among German healthcare workers at the end of the third wave of the COVID-19 pandemic
HPV vaccination of girls in the German model region Saarland: Insurance data-based analysis and identification of starting points for improving vaccination rates
Effects of socio-economic factors on elementary school student COVID-19 infections in Ontario, Canada
Disparities in COVID-19 Fatalities among Working Californians
Can individuals with low antibody responses to vaccines against other viruses acquire adequate SARS-CoV-2 antibody after vaccination with the BNT162b2 mRNA vaccine?
Temporal association of reduced serum vitamin D with COVID-19 infection: A single-institution case-control and historical cohort study
Clinical outcomes in hospitalized vaccine-breakthrough COVID-19 cases compared with contemporary unvaccinated hospitalized adults
Predicting elimination of evolving virus variants
Critical success factors for routine immunization performance: A case study of Zambia 2000 to 2018