Reuters
They found that people who carry extra copies of the gene are less likely to become infected with the virus, which affects 40 million people worldwide.
The findings may eventually lead to better ways to prevent and treat HIV (news - web sites), which has killed more than 25 million people since it was first identified in the early 1980s, said the National Institute of Allergy and Infectious Diseases (news - web sites), which funded the study.
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