Revealed: Secret of HIV's natural born killers

Only about one person in 300 has the ability to control the human immunodeficiency virus (HIV) without drugs, using a strain of "killer" cells called cytotoxic T lymphocyte (CTL) cells, previous research has found.Taking that discovery further, scientists from the United States, Canada, Japan and Germany reported that the strain has molecules called receptors that are better able to identify HIV-infected white blood cells for attack.