This may actually reduce the HIV infection rate to a large degree. Or people don't take the effing vaccine despite the benefits. Then yes, probably anybody sexually active should get it.
Agree - if we can get rid of HIV we should. I looked at the exclusion criteria in the trial and it didn't mention use of a prophylactic. Widely available prophylactics have been a huge success with preventing HIV, I wonder how that will impact the trial.
"Anybody taking the vaccine" (not "everybody") will actually not eradicate the virus, but rather protect those who take the vaccine. Much like now with Covid.
Everything else is just a question of the statistical signal detection. Those Studies are planned and designed to provide such a signal, with all we know about HIV prevalence (which is already quite low, in most industrial countries, speaking statistically and for the overall population) and the effectiveness of prophylactic treatment.
Also what I'm hearing the prophylactic treatment is not much fun either... I rather see the danger of participants getting the placebo, drop the prophylactics and think they are protected...