I think the UK volunteers taking the new vaccine to find out if it works against SARS-2 virus are extremely brave individuals (some are doing is purely for the £4000 cash grant to them). However, was this ever tried against the HIV?
As far as I know, no AIDS vaccine has ever gotten past preliminary tests. I think it is extremely unlikely they ever vaccinated someone and then deliberately gave him or her AIDS. The only thing I heard about was vaccinating populations at risk and then waiting to see if the vaccinated individuals got sick. It would be a terrible thing to give someone AIDS deliberately because there is no
natural acquired immunity to it, and because it lasts a lifetime, whereas most people recover from COVID-19 after a few weeks.
Here is a history of AIDS vaccine research, which list the reason why no vaccine has been successfully developed so far: