We all inherit original sin, which is passed down through Adam. Jesus had no human father and did not inherit original sin.
The people who get AIDS to start with are usually those disobeying the Lord's instructions.
At least 30% of people in Africa have AIDS, but why?
In their society, it is considered normal for a man to sleep with a prostitute when he is away from his family. A prostitute with HIV will give it to most of her clients. The man goes home to his wife. His wife is infected. His wife has children. They are infected.
I'm guessing that many orphaned children end up as prostitutes themselves and the whole process starts again.
There is no cure for AIDS. HIV has a generation time of 2.5 days. It has such a high mutation rate, that after about 7 generations, no virus has the same DNA as the original.
It is true that AIDS would not be anywhere near as widespread as it is if we all followed God's commandments. I knew someone who died of AIDS about nine years ago. She had got HIV from her husband- he was a heroin addict. She did leave her husband, but by then it was too late for her. It just goes to show how our sin can have devastating effects on others, even the ones we care about most.