Need to know what exactly you are looking for. HIV question? Pregnancy question?
In sick do you mean if he has a STD or HIV?
You'll be ok. The morning after pill will most defenitely prevent you from getting pregnant. My wife has take it a couple of times and it worked like a bomb. Him being sick, infected with a std is a long shot.. unless he had sex with multiple risky/suspicious partners, I won't be worried. I mean you guys are still teens, it's not like you guys have active sexual lives with multiple partners.
This is an HIV specific forum, plus your information is incorrect I know a lot of teenager that are HIV positive.