Yeah, I remember about some people being immune or at least have something that keeps them alive. This is true for a lot of viruses. Some people were resistant to the black death and most of us are their descendants, for example.
We can inject and train our body to produce antibodies, but the nature of HIV infection means (significantly) changing how our white blood cells are produced if they are going to be resistant, which is not trivial (and would likely mean actual DNA alterations with who knows what side effects). This is why an HIV vaccine is so difficult - it attacks and uses the body's immune system to spread.
The details are fuzzy, but I recall the avenue of those people's resistance/survivability being mostly a non-starter; the majority of them had a lot slower progression of the virus, not outright immunity.
We can inject and train our body to produce antibodies, but the nature of HIV infection means (significantly) changing how our white blood cells are produced if they are going to be resistant, which is not trivial (and would likely mean actual DNA alterations with who knows what side effects). This is why an HIV vaccine is so difficult - it attacks and uses the body's immune system to spread.
The details are fuzzy, but I recall the avenue of those people's resistance/survivability being mostly a non-starter; the majority of them had a lot slower progression of the virus, not outright immunity.