This entire thread is a mess...
I learned about HIV in my microbiology class and how in today's term, its 99.9% unlikely to have HIV transmitted whatsoever with someone who's on rigorous medications for the virus.
My professor (who is an HIV specialist outside his teaching credentials) has confirmed the same exact thing.
It's not impossible but its EXTREMELY hard to contract the virus from a positive individual with undetectable loads.
The virus is so dormant and repressed by that point, it just lives stagnant in your body kinda like the herpes virus, the flu, a cold, etc cause we all know viral DNA never leaves your body once it "goes away"
HIV stigma is horrible, my ex boyfriend was positive and never have I came up positive ever, and we sometimes didn't use protection because I educated myself with the virus and consulted with his doctor and a few specialists.
It's only scary if you don't know.