OP, are you talking about STIs or other medical conditions? Also, it was not clear to me whether or not you are asking about meeting people if YOU have a medical condition or imeeting a potential secondary who does.
The world opens up... when you do.
Oh, oh, can't you see? Love is the drug for me. ~Bryan Ferry
"Love is that condition in which another person's happiness is essential to your own." ~Robert Heinlein