Mystic
We're all born mad
There are two schools of thought on this subject and I clearly categorize into the minor camp as I have always resisted getting any of them. I fall into the "keeping my immune system naturally exercised" crowd.
<< waiting for the slam now>>>
No "slam" from moi, Sho. I'll even second your post.
Proper nutrition and consistent/focused exercise go a long way in boosting one's immune system. I haven't had even a "cold" in 20-30 years.