“Humans possess a gene which acts as a defence against infection by HIV, scientists have found.” The gene, CEM15, can stop the HIV virus from replicating if it is not interfered with by a protein, Vif, produced by the virus. This suggests new strategies — either finding the gene product of CEM15, which the article does not hint at, and replicating its function, or finding a way to inactivate Vif’s inactivation of the CEM15 gene — to fight HIV infection.

BBC