Do really condoms prevent hiv at over 90% (usaid.gov)? i also read that it is way lower the risk reduction (60-70%). my exposure was msm anal insertive with condom. no visible rupture?

Always using a condom during anal sex with the same infected partner does reduce it by that rate. But one always runs the risk of being in the other 10%

If you use a condom that doesn't break you will not catch HIV. Even before antivirals, HIV was not easy to catch. It was estimated that receptive anal sex with a known infected partner carried a 1 in 500 chance of transmission per episode. Factor in your condom figure and we're at 1 in 5000. Of course, two episodes without a condom make 1:250, and 10 takes you to close to 1:1. That's statistics.