HIV exposed, but not infected?
Oct 15, 2006
Has it been determined if some people can actually be exposed to the HIV virus and not become infected?
Response from Dr. Horwath
In order to be infected, certain receptor and coreceptor proteins on immune cells are needed, including one called CCR5. Some people have a genetic variation (known as delta-32 allele) that confers a strong, although not complete, resistance to HIV infection. This genetic variant apparently is not common.
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