> So, my thinking was how they ensure that all test groups are sexually exposed to other people with HIV, for the trial to be effective. They don't. Some peop

> So, my thinking was how they ensure that all test groups are sexually exposed to other people with HIV, for the trial to be effective. They don't. Some people will organically have sex with people with HIV, and some will not. Your study just needs to recruit enough participants that it is likely some will. Your study absolutely does not tell people to deliberately have sex with HIV+ partners.