Originally Posted by JGordon

You can't "kill it," but there is evidence that shows that taking antiretroviral medications immediately after you come into contact with HIV will prevent you from getting infected. The virus will stay in your bloodstream until it naturally dies off, but the drugs will keep it from reproducing. This only works if you take medications say, the day after sleeping with an HIV-infected person. There are some people who are HIV-positive but completely asymptomatic after years of infection. Most of these people have what is known as the "delta 32 allele deletion," which is a mutation that changes a receptor on your white blood cells and prevents HIV from infecting the cell. Others, like Magic Johnson, have had very good medical care, are otherwise very healthy individuals, and have had luck on their side, allowing them to be largely symptom-free after many years.