If your immune system is compromised, it is possible your body would not be able to send the resources necessary to fight off the infection that you already have immunity to, therefore there is some possibility of a reoccurring illness in an immuno-compromised individual.
Answer:
The best health-related reason to be physically active is to prevent fatigue
It could be smoking, since my grandpa had the same thing happen to him until he quit.
Just walk out and if you end up getting in trouble tell them you really needed to go and couldn't wait anymore.
