Repeating PC mantras does not make them so. You go ahead and allow your child to swim in swimming pools with HIV carriers. Be my guest. No child in my care would ever be allowed to do so. In fact, I think it might be a good idea to keep kids out of public pools, for a variety of reasons, until they are in high school and have developed immunity to any number of nasty bugs.
I am not quoting PC mantra but simply stating scientific fact. No person has ever contracted HIV from non sexual activity in a swimming pool. That is simply a fact and cannot be disputed.
As for my personal beliefs, I would be more concerned about my kids ingesting E.coli bacteria in a pool than HIV. Reason being that E.coli can stay alive for a very short amount of time in chlorinated water and HIV cannot. Again, that is fact.
BTW-I have had friends with HIV who have interacted with my children and at one point in college had a housemate with HIV and both me and my children were never at risk of contracting HIV for the simple reason that we did not have sex with, nor share needles with people infected with HIV.
The bottom line is the kids have a much greater chance of being hit by lightning while in a swimming pool than they do of contracting HIV.
However, your kids do have as much chance of contracting HIV in a swimming pool as they do being snatched from the pool by a swooping Pterodactyl and carried off to Asia.