- being a frontline healthcare worker
- muscle ache (on arm, after taking a booster shot)
- pregnancy (less than 23 weeks)
- prior recovery from bronchitis
- recovered from a sore throat over a week ago (from eating overly heaty foods)
In some of those cases, the passenger(s) were able to produce medical documents showing that they were certified fit to travel, with some even having a negative PCR test
...