It depends on the routes,company, aircraft, maintenance, genes and luck.
Sounds reasonable but, first of all, truly sorry to read of your difficulties.
"I was told I was a nervous pilot" Me too, esp with route checker sitting in.
"due to Salmonella" Seen stewardess's husband with that. Not great!
"the second Larium" Which had a bit of a reputation. In the end, I just sprayed and covered up at night.
"our passengers were from exotic destinations and brought with them exotic bacteria" Could be but I've been lucky.
"I have permanent tinitus" Had that for years - must start using it as an excuse for not always hearing Mrs Bas very well.
" instruct on gliders" Crossed my mind to instruct powered but thought better of permitting stude to kill me when, following many years of trying, I'd failed to do so myself.
"motorcycle race track" Oh, come on now! You should be dead already"
"which they don't know the cause " Yes, had that diagnosis. The bleeders don't know everything.
Anyway, you're still here and good luck!