I said yes to HIV, though it's very rare and I never saw any profiles of children who had it. I think it's much more of a consideration in international adoption from certain countries, where it's much more common and you could quite easily find a waiting child with HIV
It's a puny virus really, indredibly difficult to catch unless you are needle sharing or having unprotected sex, and there's a high viral load. I don't believe there ever has been a documented case of transmission in the home through a child getting a normal injury/nosebleed etc. So for me, either me or my other children contracting HIV would not even remotely be on the radar, I just count it as basically impossible. Heck, with medication, I've heard of couples having lots of unprotected sex so they can have babies, and that didn't result in the disease being contracted because the virus level was too low. And in the next to zero likelihood I did get it, I think I should be basically okay.
And for the child, medication could give them a nearly or totally normal life span, meds are easily managed for a smaller child, more easily managed than Diabetes for instance
So yes, I feel completely comfortable with HIV as an illness. But I do think the stigma stops people, and the fear of transmission even when it's really almost impossible
That said it's not quite that simple and you need to think about other things before you can say confidently yes to HIV (but the general principle of thid applies to any relevent medical condition, not just HIV):
You need to be comfortable talking about it with your child, including talking to them about stigma, the importance of taking the medication, safe sex, and being there for them if they want to talk about anything, from fears about it, to encountering stigma and so on and on. Knowing about their own condition can be psychologically difficult for a child, and it will be difficult encountering stigma etc...parents need to be comfortable talking about all these things
You need to be realistic about the stigma in society and help your child navigate that as and when it ever comes up, and you may face it yourself if a prejudiced person were ever to find out your child has HIV. You have to work out who, if anyone, you ever tell and when
Medication compliance with adolescents is a known issue, they find that hard sometimes, and longer term non-compliance with medication WOULD be a problem
And as hard as it is, even though you can have a totally normal life span, shit happens, life happens, and you may find yourself outliving your (adult) child. i don't think pretending that couldn't happen is helpful, it could, even though your child may well be in their late middle ages by that point