Are you referring to the risk of getting infected on board? I've read about a German case where a passenger was found to be infected. They tried to trace everyo

Are you referring to the risk of getting infected on board? I've read about a German case where a passenger was found to be infected. They tried to trace everyone who sat within 2 rows of him. Not sure if this is a very thorough approach and really represents the "danger zone". Might even depend on the plane model and quality of air conditioning.