Hi OP, I don’t know if any specifically but I might be able to help.
Although I’m the one with HIV (and reasonable knowledge of it) I’m also a mum with adult DC.
I understand your concern, especially if he contracted it recently. However if your son is on treatment, taking his meds every day, and has an undetectable VL then any time he has a cold or other illness, this should be just as likely or not as anyone else with recovery to health the same. He will also get the flu vac for free every year, though just like anyone else, this doesn’t mean he won’t get flu. Tbh he’ll probably be looking for reassurance when he gets any regular illness as health anxiety can be a thing for anyone who’s newly contracted HIV.
Try to see it as just another health condition. The meds keep the virus suppressed and the immune system gets on with doing what it does best.
As far as other forums go, there is this one forums.poz.com/index.php
And you can post in the section “someone I care about has HIV”. However the response would be from those living with HIV and not many mums post on there.
Another, more private, alternative is this website www.plushealth.org.uk/peer-support.html where anyone Who has concerns/questions about someone HIV+ close to them can, if in the UK, chat to someone living with HIV. The guy who does this is extremely helpful and knowledgeable, whatever the concern.
Feel free to message me if you like. 🙂