H.i.v. spread is not so easy to prævent as many think.

Many seem to think that the use of a condom turns transmission risk from 99% to 0% or something along those lines.

The reality is more so that it changes 1% to 0.3%, and it heavily depends on the sex act and direction of transmission as well.

Another not so often sung fact is that the transmission rate from patients who take blockers properly, and thus have an undetectable viral load is 0%.

https://www.aidsmap.com/about-hiv/estimated-hiv-risk-exposur...