"We conclude that the risk for on-board transmission of SARS-CoV-2 during long flights is real and has the potential to cause COVID-19 clusters of substantial size, even in business class-like settings with spacious seating arrangements well beyond the established distance used to define close contact on airplanes."

Nguyen Cong Khanh of the National Institute of Hygiene and Epidemiology in Hanoi, writing in a recent issue of the journal Emerging Infectious Diseases about the spread of the coronavirus on airline flights, as reported last week by CNN.