Associations of Vaccination and of Prior Infection With Positive PCR Test Results for SARS-CoV-2 in Airline Passengers Arriving in Qatar

Summary: The study provided descriptive epidemiology of the SARS-CoV-2 epidemic in Qatar, showing age as the strongest predictor of severe, critical, or fatal infection. Most cases were asymptomatic. The rapid decline in cases was attributed to the growing immunity levels in the population.