Malaria gene 'increases HIV risk'

A gene which apparently evolved to protect people from malaria increases their vulnerability to HIV infection by 40%, say US and UK scientists.
People of African descent have a variation of the "DARC" gene which may interfere with their ability to fight HIV in its early stages. The Microbe study says the gene accounts for millions of extra HIV cases in sub-Saharan Africa. However, people with the gene appear to live longer with HIV than others.

"There has always been this myth that people in sub-Saharan Africa were more likely to get HIV because of differences in their sexual behaviour, or that they are more promiscuous ."