Instruct: Identify the main category of the given Medrxiv paper based on the title.
Query: Factors associated with iron deficiency and how they can be used in blood donor selection processes
A validation study of the identification of haemophagocytic lymphohistiocytosis in England using population-based health data
High prevalence of burnout syndrome among medical and nonmedical residents during the COVID-19 pandemic
The dark side of SARS-CoV-2 rapid antigen testing: screening asymptomatic patients.
Persistent racial/ethnic associated disparity in anti-tumor effectiveness of immune checkpoint inhibitors despite equal access.
Visual and refractive status of children with Down's syndrome and nystagmus
SARS-CoV-2 in wastewater from Mexico City used for irrigation in the Mezquital Valley: quantification and modelling of geographic dispersion
Relative Ratios of Human Seasonal Coronavirus Antibodies Predict the Efficiency of Cross-Neutralization of SARS-CoV-2 Spike Binding to ACE2
Effectiveness of the mRNA BNT162b2 vaccine six months after vaccination: findings from a large Israeli HMO
Mendelian randomisation identifies alternative splicing of the FAS death receptor as a mediator of severe COVID-19
The female protective effect against autism spectrum disorder
A Micronized Electrostatic Precipitator Respirator Effectively Removes Ambient SARS-CoV-2 Bioaerosols
Effects of exercise on brain health outcomes in children with overweight/obesity: the ActiveBrains randomized controlled trial
ShaPRS: Leveraging shared genetic effects across traits or ancestries improves accuracy of polygenic scores
Exhaled SARS-CoV-2 quantified by face-mask sampling in hospitalised patients with covid-19
Toward a preventive approach to prolonged grief disorder in palliative care: Insecure attachment moderates the impact of perceived support on the severity of symptoms
Site-specific decrease in cortical reactivity during sensory trick in cervical dystonia patients.
Diet quality and risk and severity of COVID-19: a prospective cohort study
The complex relationship of air pollution and neighborhood socioeconomic deprivation and their association with cognitive decline
Protective effect of a first SARS-CoV-2 infection from reinfection: a matched retrospective cohort study using PCR testing data in England
Asia Pacific Sepsis Alliance; Critical Care Resources and Disaster Preparedness Survey 2020 Results (March 2021)
Determinants of stunting among children < 5 years of age: Evidence from 2018-2019 Zambia Demographic and Health Survey
Predicting anti-cancer activity in flavonoids - a graph theoretic approach
Multi-ancestry meta-analysis of asthma identifies novel associations and highlights the value of increased power and diversity
Evaluating the impact of RSV immunisation strategies on antibiotic use in England
The impact of COVID-19 restrictions on older adults'loneliness: Evidence from high-frequency panel data inAustria