In the meantime, while we are waiting patiently
"British Airways is to launch a voluntary coronavirus test for passengers travelling to the UK from three American airports.
The airline said it will trial a testing regime, in partnership with American Airlines, which will involve hundreds of travellers on particular routes from the US to Heathrow.
The passengers will be tested 72 hours before departure, and then on arrival at the west London airport, and three days later.
British Airways, which will share the results of the project with the UK and US governments, is hoping to persuade ministers that testing travellers will make quarantining unnecessary."
If these people are not followed up after 3 days of landing wouldn't that increase the risk of letting many through who might have caught it at the airport/airplane and not yet have enough of a viral load to be +?