July 6, 2021, Vol 326, No. 1, Pages 11-96
Associations of Vaccination and of Prior Infection With Positive PCR Test Results for SARS-CoV-2 in Airline Passengers Arriving in Qatar
Roberto Bertollini, MD, MPH; Hiam Chemaitelly, MSc; Hadi M. Yassine, PhD; et al.
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JAMA. 2021;326(2):185-188. doi:10.1001/jama.2021.9970
This study explores the association of vaccination against COVID-19 or prior SARS-CoV-2 infection with PCR test positivity in airline passengers arriving in Qatar, February-April 2021.