Instruct: Identify the main category of the given Medrxiv paper based on the title.
Query: Tracking WhatsApp behaviors during a crisis: A longitudinal observation of messaging activities during the COVID-19 pandemic
Effects of COVID-19 in Care Homes - A Mixed Methods Review
Immunological Insights Into the Therapeutic Roles of CD24Fc Against Severe COVID-19
The Effect of Frames on COVID-19 Vaccine Hesitancy
The emergence and ongoing convergent evolution of the N501Y lineages coincides with a major global shift in the SARS-CoV-2 selective landscape
Data and care integration for post-acute intensive care program of stroke patients: effectiveness assessment using a disease-matched comparator cohort
Racial/ethnic-based spirometry reference equations: Are they accurate for admixed populations?
Large-scale cross-sectional seroepidemiologic study of COVID-19 in Japan: Acquisition of herd immunity and the vaccines' efficacy
Evaluation on the Effectiveness on the Implementation of WHO-CST Programme in Hong Kong: A RCT Protocol
ISARIC COVID-19 Clinical Data Report: 8 April 2021
Impact and cost-effectiveness of frequent HIV re-testing among key populations in Viet Nam: a modeling study
The Joint Impact of COVID-19 Vaccination and Non-Pharmaceutical Interventions on Infections, Hospitalizations, and Mortality: An Agent-Based Simulation
Sensitivity of Estimated Tacrolimus Population Pharmacokinetic Profile to Inaccurate Assumptions about Dose Timing and Absorption: An Investigation in Real-World and Simulated Data
Public Covid-19 X-ray datasets and their impact on model bias - a systematic review of a significant problem
Assessing the level and determinants of COVID-19 Vaccine Confidence in Kenya
Simulation Platforms to Support Teaching and Research in Epidemiological Dynamics
Diagnostic accuracy of rapid point-of-care tests for diagnosis of current SARS-CoV-2 infections in children: A systematic review and meta-analysis
One size does not fit all: Single-subject analyses reveal substantial individual variation in electroencephalography (EEG) characteristics of antidepressant treatment response
Clustered Mendelian Randomization analyses identifies distinct and opposing pathways in the causal association between insulin-like growth factor-1 and type 2 diabetes mellitus
Disentangling "Bayesian brain" theories of autism spectrum disorder
Exploring health in the UK Biobank: associations with sociodemographic characteristics, psychosocial factors, lifestyle and environmental exposures
Knowledge and Impact of COVID-19 on Middle-Aged and Older People living with HIV in Lima, Peru
Benchmarking Deep Learning Models and Automated Model Design for COVID-19 Detection with Chest CT Scans
Willingness to receive vaccination against COVID-19: results from a large nationally representative Australian population survey
Trajectories of Perceived Negative Impact in Parents of Individuals with Autism Spectrum Disorders from 9 to 25 years of age
Challenges in defining Long COVID: Striking differences across literature, Electronic Health Records, and patient-reported information