Chronic coughers and people with colds and sniffles were screened out of patrols too. I don't know about chronic farters though.Chines troops ate a lot of garlic and people said you could smell them.
You spent enough time in the Middle East to know that different smells came from different ethnic or even regional people. Most of the time it wasn't unpleasant but the odd time it would be noticeable before entering a village or town, because it all smelled the same and wasn't the least bit pleasant.
After leaving, the smell wouldn't leave your nose until you had a shower and changed clothes.
This goes on all over the world and we smell just as good to them as as they do to us.