Instruct: Identify the main category of the given Medrxiv paper based on the title.
Query: Effectiveness of whole virus COVID-19 vaccine at protecting health care personnel against SARS-CoV-2 infections in Lima, Peru
Access to HIV-prevention in female sex workers in Ukraine between 2009 and 2017: coverage, barriers and facilitators
Comparing lateral flow testing with a rapid RT-PCR method for SARS-CoV-2 detection in the UK
Effectiveness of gamified team competition in the context of mHealth intervention for medical interns: a micro-randomized trial
Real-time PCR assays for detection and quantification of early P. falciparum gametocyte stages
Significant and sustained decrease in non-SARS-CoV-2 respiratory viral infections during COVID-19 public health interventions.
Evaluation of the Nutritional Quality of Ultra-Processed Foods (Ready to Eat + Fast Food): Fatty Acid Composition
Platelet polyphosphate and SARS-Cov-2 mRNA-vaccine-induced inflammatory side-effects: a pilot study
Seroconversion rate after primary vaccination with two doses of BNT162b2 versus mRNA-1273 in solid organ transplant recipients: a systematic review and meta-analysis
Regulatory T-cells are central hubs for age-, sex- and severity-associated cellular networks during COVID-19
Impact of COVID -19 on Depression and Anxiety among Healthcare Professionals in Abu Dhabi
Significant reduction in humoral immunity among healthcare workers and nursing home residents 6 months after COVID-19 BNT162b2 mRNA vaccination
Rapid spread of a SARS-CoV-2 Delta variant with a frameshift deletion in ORF7a
Effects of Varying Approaches to Lifting COVID-19 Pandemic Restrictions in the United States
The COVID-19 Yorkshire Rehabilitation Scale (C19-YRS): application and psychometric analysis in a post-COVID-19 syndrome cohort
Global and local ancestry modulate APOE association with Alzheimer's neuropathology and cognitive outcomes in an admixed sample
The Association Between Threatened Miscarriage And Development Of Gestational Hypertension/Pre-Eclampsia
Clinical Characteristics and Durations of Hospitalized Patients With COVID-19 in Beijing: A Retrospective Cohort Study
The Acute Effects of Physical Exercise Breaks on Cognitive Function During Prolonged Sitting: A First Quantitative Evidence
Evaluating Fomite Risk of Brown Paper Bags Storing Personal Protective Equipment Exposed to SARS-CoV-2: A Quasi-Experimental Study
Local public health officials and COVID-19: Evidence from China
Blood group O and post-COVID-19 syndrome
Risk Profile of Thanksgiving Gatherers and Subsequent SARS-CoV2 Testing and Diagnosis
Predicting disability progression and cognitive worsening in multiple sclerosis using grey matter network measures
Oral antiviral clevudine compared with placebo in Korean COVID-19 patients with moderate severity
Persistence of immunity and impact of a third (booster) dose of an inactivated SARS-CoV-2 vaccine, BBV152; a phase 2, double-blind, randomised controlled trial