Pre mRNA vaccine, let’s say that a pilot could become incapacitated every million flight hours. Under the stressful conditions of a pilot being incapacitated, perhaps a copilot would become incapacitated every 100,000 hours. Post mRNA, perhaps those numbers go to 100,000 and 100 or 1000.
I presume single pilot flight decks are 100 or 1000 times as dangerous as dual pilot flight decks.
Why would that be?
Pre mRNA vaccine, let’s say that a pilot could become incapacitated every million flight hours. Under the stressful conditions of a pilot being incapacitated, perhaps a copilot would become incapacitated every 100,000 hours. Post mRNA, perhaps those numbers go to 100,000 and 100 or 1000.
How was incapacitation defined and how was it caused in the cited statistics?
Good question. It's unclear if a consistent and precise definition is being used in the cited statistics.
Nevertheless, I found this discussion, which looks good: https://skybrary.aero/articles/pilot-incapacitation