Hm...this is an interesting question because it affects me on different levels.
First, teens and young adults don't really know what safe sex practice is these days. It used to be taught a *lot* in the 1970s and everyone knew what the types of STDs were out there, and what they did, and how they affected folks. Now, all teens know is "HIV" and they don't realize that even oral sex can give them STDs. They don't know about chlamydia, about herpes, or gonorrhea, or anything else. They don't realize that those diseases can be just as debilitating as HIV, and some you don't realize you have.
So yes, I think there's reason for concern. But the concern should be that sex at any time is a gamble, so use protection and be as safe as you can. The only "safe" sex practice is having one partner, and you and that partner being in a monogamous relationship all the time.
Annnd...how often does that happen?
On the other end of the spectrum, I've had close family members die of the disease and one of my good friends is managing his quite well (although he's had to go under the table for his meds). AIDS is less of a disease to fear, but we should be careful any time we have a sexual encounter. There are risks, period.
Ah. To answer the question - lol! I think...I'd pretty much do the same thing I've always done, except I'd try to take better care of myself and fight to stay healthy.