Instruct: Identify the main category of Medrxiv papers based on their titles.
Query: Collaborative Cohort of Cohorts for COVID-19 Research (C4R) Study: Study Design
Curtailing Covid-19 on a Dollar-a-Day in Malawi: Implications for the Ongoing Pandemic
Strength and durability of antibody responses to BNT162b2 and CoronaVac
Vulnerabilities in child wellbeing among primary school children: a cross-sectional study in Bradford, UK
Examining the Association between the Gastrointestinal Microbiota and Gulf War Illness: A Prospective Cohort Study
Positive Mental Training in patients with Multiple Sclerosis experiencing psychological distress: A Preliminary Randomised Controlled Trial
Plasma Metabolomic Profiling in Patients with Rheumatoid Arthritis Identifies Biochemical Features Indicative of Quantitative Disease Activity
Dynamics of SARS-CoV-2 exposure in Malawian blood donors: a retrospective seroprevalence analysis between January 2020 and February 2021
The COVID-19 pandemic and child malnutrition in sub-Saharan Africa: A scoping review
Association between work attendance when experiencing fever or cold symptoms and company characteristics and socioeconomic status in the COVID-19 pandemic in Japanese workers: a cross-sectional study
Doubtful Clinical Benefit of Casirivimab-Imdevimab Treatment for Disease Severity Outcome of High-Risk Patients with SARS-CoV-2 Delta Variant Infection
How frequent are acute reactions to COVID-19 vaccination and who is at risk?
Seroprevalence of Antibodies to SARS-CoV-2 among Health Care Workers in Kenya
Acute-stress induced change in salience network coupling prospectively predicts post-trauma symptom-development.
High failure rate of ChAdOx1-nCoV19 immunization against asymptomatic infection in healthcare workers during a Delta variant surge: a case for continued use of masks post-vaccination
A cohort study on the duration of Plasmodium falciparum infections during the dry season in The Gambia
The evaluation of a newly developed antigen test (QuickNavi™-COVID19 Ag) for SARS-CoV-2: A prospective observational study in Japan
Parental attitudes towards mandatory vaccination; a systematic review
Status Quo and Influencing Factors of Family Doctors Performance in Dongguan City
Modeling non-pharmaceutical interventions in the COVID-19 pandemic with survey-based simulations
Narratives of the convalescent plasma donor in a Peruvian social security hospital: motivations, fears, expectations and experiences
Occupational stress and quality of sleep among dentists in the Philippines
The impact of COVID-19 on primary health care and antibiotic prescribing in rural China: qualitative study
Vaccine Rollout Strategies: The Case for Vaccinating Essential Workers Early
The E484K mutation in the SARS-CoV-2 spike protein reduces but does not abolish neutralizing activity of human convalescent and post-vaccination sera.
Longitudinal analysis of UK Biobank participants suggests age and APOE-dependent alterations of energy metabolism in development of dementia