I'm 28 years old and here's my list
Mouth cancer (have been battling smoking for a few years)
Skin cancer (checked every mole :)
ALL STD's (even though I'm a faithful husband, but still thought I had them)
The list would be longer, but these keep me busy enough :). HIV was finally "cured" with a test... but mouth and throat cancer is a daily battle. I don't have time for other diseases when I am occupied with these.
However, I am getting a lot better. Been dealing with the tobacco cancers for 12 years and I think I've finally got a handle on things. Every day is a step in the right direction... maybe some day, I won't be a hypo!
Today will not be as bad as yesterday... and tomorrow will not be as bad as today.