[exhaustedmomma]

Surely they make provisions for illness in space. Space field manual, etc.

[Calvin Locke]

To get an idea of what goes on, at least back during the 1980s, read Riding Rockets by Mike Mullane.

He has stories about "space sickness", pre-flight bugs, and sickness problems returning to gravity.

Oh, and the minimally trained "payload specialists" that all but freaked out when environmental problems occurred, such as not being able to use the toilet.