Instruct: Identify the main category of the given Medrxiv paper based on the title.
Query: Hepatitis B virus infection in the Lao PDR: A systematic review
Association of socioeconomic and environmental factors with the spatio-temporal variability of suicide rates along a latitudinal gradient
The energy balance theory: an unsatisfactory model of body composition fluctuations
Genomic and transcriptomic data analyses highlight KPNB1 and MYL4 as novel risk genes for congenital heart disease
High-resolution ultrasonography of gingival biomarkers for periodontal diagnosis in healthy and diseased subjects
Immune responses to inactivated and vector-based vaccines in individuals previously infected with SARS-CoV-2
Risk factors for severe PCR-positive SARS-CoV-2 infection in hospitalized children: a multicenter cohort study
The vaccine-elicited immunoglobulin profile in milk after COVID-19 mRNA-based vaccination is IgG-dominant and lacks secretory antibodies
Systemic cytokines and GlycA discriminate inflammaging, disease progression and corticosteroid response in HTLV-1-associated neuroinflammation
Accelerated RNA detection using tandem CRISPR nucleases
Labeling self-tracked menstrual health records with hidden semi-Markov models
Single-cell genomics improves the discovery of risk variants and genes of cardiac traits
Training and Development Needs Assessment in a large NIHR Biomedical Research Centre: A Survey
Hydroxychloroquine for pre-exposure prophylaxis of COVID-19 in health care workers: a randomized, multicenter, placebo-controlled trial (HERO-HCQ)
Investigating the effect of sexual behaviour on oropharyngeal cancer risk: a methodological assessment of Mendelian randomization
X-ray Dark-Field Chest Imaging can Detect and Quantify Emphysema in COPD Patients
Childhood malnutrition and bacteraemia at a tertiary hospital in Malawi
Community Organizing for Indigenous People in the Philippines: A Proposed Approach
DIP: Natural History Model for Major Depression with Incidence and Prevalence
Dramatic drop of new SARS-CoV-2 infections among health care workers after the first dose of the BNT162b2 mRNA Covid-19 Vaccine
COVID-19 vaccine impact on rates of SARS-CoV-2 cases and post vaccination strain sequences among healthcare workers at an urban academic medical center: a prospective cohort study
Monoclonal Antibody Treatment, Prophylaxis and Vaccines Combined to Reduce SARS CoV-2 Spread
A two-stage super learner for healthcare expenditures
HIV infection is linked with reduced error-related default mode network suppression and poorer medication management abilities
The Triangulation WIthin A STudy (TWIST) framework for causal inference within Pharmacogenetic research
Pre-Pandemic COVID-19 in New York City: A descriptive analysis of COVID-19 illness prior to February 29, 2020