Research published by the US-based Centers for Disease Control and Prevention (CDC) shows coronavirus can spread easily among passengers on long-haul flights.
The report looks at the case of a woman who flew in business class from London to Vietnam in March.
Although she passed a temperature check, she developed symptoms in the days following the flight and tested positive just five days later.
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Contact tracers managed to link her to 15 of her fellow passengers who also later tested positive for the virus.
However, there is a caveat - at the time face coverings were not mandatory on flights, and so it is unlikely most of the passengers were wearing masks.
