Instruct: Identify the main category of the given Medrxiv paper based on its title.
Query: COVID-19 Vaccine hesitancy in Addis Ababa, Ethiopia: A mixed-methods study
Perceptions of and obstacles to SARS-CoV-2 vaccination among adults in Lebanon: a cross-sectional online survey
Effectiveness of COVID-19 vaccines against Omicron or Delta symptomatic infection and severe outcomes
The effect of respiratory activity, ventilatory therapy and facemasks on total aerosol emissions
Impact of voluntary risk-mitigation behaviour on transmission of the Omicron SARS-CoV-2 variant in England
Transmission of SARS-CoV-2 Omicron VOC subvariants BA.1 and BA.2: Evidence from Danish Households
Predicting elimination of evolving virus variants
Relationship Between Patient Sex and Serum Tumor Necrosis Factor Antagonist Drug and Anti-Drug Antibody Concentrations in Inflammatory Bowel Disease; A Nationwide Study
TIME TO LUNG VOLUME STABILITY AFTER PRESSURE CHANGE DURING HIGH-FREQUENCY OSCILLATORY VENTILATION
At least three doses of leading vaccines essential for neutralisation of SARS-CoV-2 Omicron variant
Seroepidemiological Study of Novel Corona Virus (CoVID-19) in Tehran, Iran
The impact of environmental mycobiomes on geographic variation in COVID-19 mortality
Saliva testing is accurate for early-stage and presymptomatic COVID-19
A Novel de novo TP63 Mutation in WholeExome Sequencing of a Syrian Family with Oral Cleft and Ectrodactyly
Characterization of the skin microbiota in bullous pemphigoid patients and controls reveals novel microbial indicators of disease
Impact of health system strengthening on delivery strategies to improve child immunization coverage and inequalities in rural Madagascar
An Examination of School Reopening Strategies during the SARS-CoV-2 Pandemic
Trends in Awareness, Antihypertensive Medication Use and Blood Pressure Control by Race and Ethnicity Among Adults with Hypertension in the United States: A National Health and Nutrition Examination Analysis from 2011 to 2018
Finger stick blood test to assess post vaccination SARS-CoV-2 neutralizing antibody response against variants
Functional respiratory capacity in the elderly after COVID-19 -- a pilot study
Metabolic alkalosis and mortality in COVID-19
The Digital Analytic Patient Reviewer (DAPR) for COVID-19 Data Mart Validation
Ad26.COV2.S breakthrough infections induce high titers of antibodies capable of neutralizing variants of concern
Inter-population differences of allele frequency and regulome tagging are associated with the heterogeneity of loci identified by cross-ancestry genome-wide association studies
Community structured model for vaccine strategies to control COVID19 spread: a mathematical study
Characterization of a base-resolution common deletion region within CDKN2A gene in cancers and its biological and clinical significances