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It is told in the video that less than 1% are immune to AIDS ... But how's it possible to have immunity against AIDS... Bcoz I have studied that HIV a staging system and only stage 4 are considered HIV infected ... So is it about stage 1,2 and 3 who are said to be immune.??

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Researchers are trying to find out why some people carry a genetic mutation that makes them highly resistant to HIV infection. This mutation, called Delta32, keeps a protein called CCR5 from rising to the surface of the immune system’s T cells. When CCR5 is on the surface of the cell, HIV is able to latch on to it and infect the cell; when it is not, the cell’s “door” is effectively closed to HIV.

Very few people have this genetic variation, which some scientists think has been inherited from ancestors who survived the massive bubonic plague in Europe centuries ago. About 1% of Caucasians have it, and it is even rarer in Native Americans, Asians, and Africans. A 2005 report indicated that 1% of people descended from Northern Europe are virtually immune to AIDS.

Those lucky enough to be resistant must inherit the HIV-shielding genes from both parents, though having only one parent with the mutation still leaves a child better prepared to defend HIV than having none


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