Given that it requires sexual contact to contract, I bet we could vaccinate a small portion of high risk people and effectively eradicate the disease entirely, without ever needing to vaccinate everyone.

> vaccinate a small portion of high risk people and effectively eradicate the disease

You could remove it as an endemic disease in the US and Europe. In places like South Africa where a third of the population is infected, nothing less that a blanket vaccination campaign would work.

(And of course it is not easy to find out who the high risk people are when both HIV and sexual promiscuity are stigmatised, so you might need to vaccinate everyone anyway to avoid costly errors...)

Too bad it doesn't require sexual contact to contract.

You mean HIV? Yeah, you can get it from fluid-to-blood contact, accidentally getting yourself with a needle, or someone trying to use a contaminated needle as a bio-weapon. Microscopic cuts under your fingernails are important, so you should wear gloves for sure.