Originally Posted by GetRealDude

It's not complicated.
He got worse on the way back.
I do have allergies regularly - every Spring. Sick calls as needed. FAA approved meds are pretty good so it's limited.

Never had anyone before or since like that guy.

I'm not a Doc.
Never said I was.
Remove him from a trip? Simple.
Make a phone call and coordinate it. I'm sure you can figure it out from there.