Well, if you need to have for example multiple entry visa for Russian Federation, they want your HIV results everytime.
That is once a year.
And also applies to aircrew.
Yes, it could be a violation of civil rights in some sense, but other way to look at it is that also YOU will know what is your situation.
Even without " risky lifestyle ", I am happy to be tested every year. If for some reason, should I become infected, the last thing I would want is to pass it to someone I love.
Just a though...