NEW YORK - As more people pack their bags to travel, a new study found that the risk of exposure to COVID-19 while on a Delta flight decreased significantly due the airline’s pre-flight testing for the virus.According to the peer-reviewed study published in "Mayo Clinic Proceedings," the risk of infection after all passengers tested negative 72 hours in advance of the flight was less than 0.1 percent. RELATED: United, Frontier roll out COVID-19 vaccination requirements for workersResearchers examined data on Delta’s COVID-19-tested flight corridors between New York’s JFK, Atlanta and Italy’s Fiumicino International Airport.The 15-page study showed a single COVID-19 molecular test performed within 72 hours of departure could decrease the.