A few people with HIV are described as non-progressors. These people have HIV that does not progress to more severe symptoms or disease, but they can still spread HIV. Most non-progressors:
Have lived with the infection for 10 to 15 years and remained healthy.
Do not have declining CD4+ cell counts.
Have a very low level of HIV in their blood.
A small number of people never become infected with HIV despite years of exposure to the virus. For example, they may have repeated, unprotected sex with an infected person. These people are said to be HIV-resistant. These people are never infected, so they can't spread HIV.
Studies are under way to determine why some people either don't become infected with HIV or, if they do, why they don't develop symptoms or lose CD4+ cells. Research has shown that:
Some people's CD4+ cells are relatively resistant to HIV. If HIV cannot attach itself to CD4+ cells, it cannot destroy them.
ByHealthwise Staff Primary Medical ReviewerE. Gregory Thompson, MD - Internal Medicine Brian O'Brien, MD, FRCPC - Internal Medicine Adam Husney, MD - Family Medicine Specialist Medical ReviewerPeter Shalit, MD, PhD - Internal Medicine, Infectious Disease