Global
During the 70s and 80s, the HIV epidemic propagated from Africa via Haiti and the USA to every country in the world. HIV infection is primarily transmitted by sexual means.
Worldwide, the number of those living with HIV infection continues to rise, although more slowly. However, the number of those newly infected was steadily sinking from 1996 (3.5 million) to 2008 (2.3 million). This may be due to more frequent treatment with antiretroviral drugs (ART). In 2008, in poor countries every third HIV-infected person (4 million) received antiretroviral therapy, which is ten times more than in 2003.
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