Infection With 2 HIV Strains Slows Disease Progression, Lund University Study

While many people don't know it, there's more than one kind of AIDS virus. Besides the HIV-1 strain that's common throughout the world, a type known as HIV-2 is found in some parts of Africa. Now, a new study finds that people infected with HIV-2 and later with HIV-1 appear to be better equipped to fight off the virus. Double-infected people can still go on to develop AIDS, and there's no indication that anyone infected with HIV-1 should go out in search of HIV-2.

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