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  Dr. Bette Korber tested the oldest known HIV sample. From this, he estimated that Hiv-1 Subtype M was first spread to humans in 1931 from Cameroon chimps.
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  People die from AIDS in the U.S., Europe, and Africa.
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  Pneumocystis pneumonia is seen to be linked to AIDS because it occurs in humans with weak immune systems.
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  The first AIDS clinic is opened in San Francisco, California
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  HIV is Found to Cause AIDS.
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  From that day on, every December 1st, World AIDS Day is dedeicated to raising AIDS awareness and unite in the fight against AIDS.
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  AIDS is now a leading cause of death in Americans ages 25-44.
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  Dr. Beatrice Hahn and a group of researchers found that HIV-1 M comes from Pan troglodytes troglodytes in Cameroon, which is in South Africa.
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  The AIDS Memorial Quilt, in Washington D.C., is complete for its 25th Anniversary
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  CDC released a study that with a daily dose of medicine for people without HIV could prevent the transfer of HIV from an HIV-positive person to an HIV-negative person.
