California who had been wrongly diagnosed with pneumocystic pneumonia or Kaposi's sarcoma. That is why AIDS was first given the name gay-related immunodeficiency disease (GRID). After many revisions by the Center for Disease Control, AIDS is defined as anyone having a density of CD4 cells less than 200 cells per micro-liter of blood. The disease spread two ways: spatially contagious diffusion and hierarchical diffusion. Spatially contagious diffusion is where the disease moves from the initial source of infection. The disease starts at one point and then just keeps spreading. Hierarchical diffusion means that the disease jumps from place to place. That means that a person carrying the disease can be in Detroit and then spread that disease in by going to Vermont. That is how the virus originated and spread to the point we are at today.
             In Africa, the disease is the most severe. The official figures that are reported to the World Health Organization are almost useless. Politicians in many African countries deliberately under-report how big the problem of HIV/ AIDS actually is. They feel a sense of greed that if people knew how big of an epidemic the disease actually is then it woul
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