Instruct: Identify the main category of the given Medrxiv paper based on the title.
Query: Is the vitamin D status of patients with COVID-19 associated with reduced mortality?
SARS-CoV-2 IgG seroprevalence in the Okinawa Main Island and remote islands in Okinawa, Japan, 2020-2021.
Antibody and T-cell responses to a single dose of the AZD1222/Covishield vaccine in previously SARS-CoV-2 infected and naive health care workers in Sri Lanka
Nosocomial RSV-related in-hospital mortality in children <5 years: a global case series
Exposure to Wildfire Smoke and Particulate Matter among Washington State Construction Workers; Potential Impacts and Implications for Worker Protection
Productivity burden borne by the parents of persons with Angelman syndrome
Has the age distribution of hospitalized Covid-19 patients changed in Brazil?
Causal Effects Contributing to Elevated Metabolic Power During Walking in Children Diagnosed with Cerebral Palsy
Trajectories of Hypoxemia & Respiratory System Mechanics of COVID-19 ARDS in the NorthCARDS dataset
Examining disparities relating to service reach and patient engagement with COVID-19 remote home monitoring services in England: a mixed methods rapid evaluation
Investigation of gene-environment interactions in relation to tic severity
The final blink: intact cerebellar associative learning in isolated dystonia
Prevalence of Specific Multimorbidity Combinations and Association with Medical Expenditures and Perceived Health among U.S. Adults, 2016-2019
Modifiable traits, healthy behaviours, and leucocyte telomere length
Differential age-associated brain atrophy and white matter changes among homeless and precariously housed individuals compared to the general population
Evaluating and optimizing COVID-19 vaccination policies: a case study of Sweden
A qualitative exploration of the perspectives of international medical students residing in university hostels amid COVID-19 pandemic lockdown
Machine learning-based prediction of motor status in glioma patients using diffusion MRI metrics along the corticospinal tract
High- Versus Low-Dose Dexamethasone for the Treatment of COVID-19-related Acute Respiratory Distress Syndrome: A Multicenter and Randomized Open-label Clinical Trial
SeroTracker-ROB: reproducible decision rules for risk of bias assessment of seroprevalence studies
Body Clock: Matching Personalized Multimorbidity and Fast Aging Using Information Entropy
Altered functional connectome hierarchy with gene expression signatures in newly-diagnosed focal epilepsy
Automated Detection of Cerebral Microbleeds on MR images using Knowledge Distillation Framework
Pramipexole Enhances Reward Learning by Preserving Value Estimates
Inequities in childhood immunisation coverage associated with socioeconomic, geographic, maternal, child, and place of birth characteristics in Kenya
The effect of Covid-19 isolation measures on the cognition and mental health of people living with dementia: a rapid systematic review of one year of evidence.