Some people may transmit weaker AIDS virus

People with a genetic variation that slows down HIV may also be causing a mutation to the AIDS virus that makes it less potent if transmitted to others, researchers said on March 21. The human immunodeficiency virus that causes AIDS attacks immune system cells. Like other viruses, it cannot replicate on its own but must hijack a cell and turn it into a virus factory.
HIV must evade several genes to do this, including an immunity gene called HLA.