Instruct: Identify the main category of the given Medrxiv paper based on the title.
Query: The trends in maternal age distribution and the estimated live birth and population prevalence of Down syndrome in China: 1985-2012
Hospitalization as reliable indicator of second wave COVID-19 pandemic in eight European countries
Prior SARS-CoV2 infection in vaccinated solid organ transplant recipients induces potent neutralization responses against variants, including Omicron
Epigenome-wide contributions to individual differences in childhood phenotypes: A GREML approach
Association of Convalescent Plasma Treatment with Reduced Mortality and Improved Clinical Trajectory in Patients Hospitalized with COVID-19 in the Community Setting
Associations of behavioral problems and white matter properties of the cerebellar peduncles in boys and girls born full term and preterm
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.
Poking COVID-19: insights on genomic constraints among immune-related genes between Qatari and Italian populations
SARS-CoV-2 lineage dynamics in England from September to November 2021: high diversity of Delta sub-lineages and increased transmissibility of AY.4.2
A Novel Smart City Based Framework on Perspectives for application of Machine Learning in combatting COVID-19
Application of concise machine learning to construct accurate and interpretable EHR computable phenotypes
A new multi-species Protein A-ELISA assay for plague diagnosis in humans and other mammal hosts
Enhancing Research Data Infrastructure to Address the Opioid Epidemic: The Opioid Overdose Network (02-Net)
Safeguarding Adolescent Mental Health in India (SAMA): study protocol for co-design and feasibility study of a school systems intervention targeting adolescent anxiety and depression in India.
Clinical and Computational Speech Measures are Associated with Social Cognition in Schizophrenia Spectrum Disorders
Clinical manifestations and disease severity of SARS-CoV-2 infection among infants in Canada
Retrospective mortality and prevalence of SARS-CoV-2 antibodies in greater Omdurman, Sudan: a population-based cross-sectional survey
Sex differences in the influence of toxoplasmosis on stress and perceived anxiety: Evidence for the stress-coping hypothesis
The dramatic surge of excess mortality in the United States between 2017 and 2021
Evaluation and risk communication of effects of alcohol exposure on disposable procedure masks and portable air purifiers
Smartphone-based videoconference visits are easy to implement, effective, and feasible in Crohn's Disease Patients: A Prospective Cohort Study
Computational analysis of quantitative echocardiographic assessments of functional mitral regurgitation: Proximal Isovelocity Surface Area methods
Plasma multi-omic and cardiac imaging network signatures predict poor long-term outcomes after acute myocardial infarction
Anatomical phenotyping and staging of brain tumors
The contribution of malaria and sickle cell disease to anaemia among children aged 6 to 59 months in Nigeria: A secondary analysis using data from the 2018 Demographic and Health Survey
Predicting willingness to be vaccinated for Covid-19: evidence from New Zealand