The CCR5 mutation delta-32 makes the protein far smaller and no longer on the outside of white blood cells. This mutation is extremely convenient for those who have it. It prohibits the HIV virus from binding to cells. This prevents diseases like Aids and Viremia
WHERE DID THIS MIRACLE MUTATION COME FROM?
Genetisicts traced the origin of this mutation to the bubonic plague while looking at common mutations of people who seemed to be immune to the black death. Chances are the mutation didn't make people immune to the plague but something else that was common in Eastern Europe, smallpox.
THE FUTURE FOR CCR5
The delta-32 mutation is obviously a very important mutation for the future of genetics and humanity. One day the mutation will hopefully be given to everyone but science is not there yet.