But nobody talks about it unless pressed.
Compare and contrast Uganda, where it's very much part of the discourse. The Museveni government's efforts against HIV have been downgraded a lot in retrospect -- it appears Uganda's prevalance estimates in the '90s were inflated, by various people for various reasons, so the drop was much less dramatic than first thought. But the downgrade has been from "whoa awesome" to "still pretty solid". HIV came up sometimes in discussions there, and people were pretty open about it. That was with an adult infection rate maybe a third of Zambia's. But here? Nope: just doesn't get mentioned somehow.