comment: >
  
  RTPCR should be taken 5 to 7 days after exposure. Surely some of them have false negative results. The positive results are probably those who already have the virus before the flight.
context: and if they didnt have it at the start of the flight they would by the end.. >
  
  I mean it's gotta be at least 95% right, if 50% of the passengers are infected