A crew member reports direct to the plane for duty and other crew have suspicions about his condition , if they suggest he goes sick and he does not then if they know they can report him and he won't lose his job then pressure off just report him , get tested and help . If he will automatically lose his job as he has signed on then will the crew report him ? Or will they circle the wagons and get him to the destination ?
The idea of door closed is a good cut off point .