Instruct: Identify the main category of a Medrxiv paper based on its title.
Query: Grandfathers and Grandsons: Social Security Expansion and Child Health in China
An observational study of the association between COVID-19 vaccination rates and participation in a vaccine lottery
Protocol for rapid implementation of a SARS-CoV-2 sero-survey during the 2020 COVID-19 pandemic: who, where, how?
Identifying and alleviating bias due to differential depletion of susceptible people in post-marketing evaluations of COVID-19 vaccines
Recurrent aphthous stomatitis affects quality of life
Distribution of 54 polygenic risk scores for common diseases in long lived individuals and their offspring
The Influence of Coronavirus Disease-2019 (COVID-19) On Parkinsons Disease: An Updated Systematic Review
Combined Metabolic Activators Improves Cognitive Functions in Alzheimer's Disease
Viral dynamics of SARS-CoV-2 variants in vaccinated and unvaccinated individuals
Infrequent intranasal oxytocin followed by positive social interaction improves symptoms in autistic children: a randomized clinical trial
Seroprevalence of anti-SARS-CoV-2 IgG antibodies among truck drivers and assistants in Kenya
Favipiravir, lopinavir-ritonavir or combination therapy (FLARE): a randomised, double blind, 2x2 factorial placebo-controlled trial of early antiviral therapy in COVID-19
Monitoring socioeconomic inequalities across HIV knowledge, attitudes, behaviours and prevention in 18 sub-Saharan African countries
Anti-SARS-CoV-2 seropositivity among medical students in Copenhagen
Standardised, quantitative neutralisation responses to SARS-CoV-2 Variants of Concern by convalescent anti-sera from first wave infections of UK Health Care Workers and Patients
A novel assessment method for COVID-19 humoral immunity duration using serial measurements in naturally-infected and vaccinated subjects.
Early and rapid identification of COVID-19 patients with neutralizing type I-interferon auto-antibodies by an easily implementable algorithm
Factors Associated with COVID-19 Testing among People who Inject Drugs: Missed Opportunities for Reaching those Most at Risk
Estimating dengue transmission intensity from serological data: a comparative analysis using mixture and catalytic models.
Community factors associated with local epidemic timing of respiratory syncytial virus: a spatiotemporal modeling study
Clonality and timing of relapsing colorectal cancer metastasis revealed through whole-genome single-cell sequencing
Impact of COVID-19 restrictions on diabetes health checks and prescribing for people with type 2 diabetes: a UK-wide cohort study involving 618,161 people in primary care
Engagement with daily testing instead of self-isolating in contacts of confirmed cases of SARS-CoV-2: A qualitative analysis
The influence of sex steroid treatment on insular connectivity in gender dysphoria
Predominance of the SARS-CoV-2 lineage P.1 and its sublineage P.1.2 in patients from the metropolitan region of Porto Alegre, Southern Brazil in March 2021: a phylogenomic analysis
Differential associations between neocortical tau pathology and blood flow with cognitive deficits in early-onset vs late-onset Alzheimer's disease