The Human Immunodeficiency Virus (HIV) is a single-stranded RNA virus which reproduces in human CD4-positive cells, which are primarily T-helper lymphocytes and macrophages. HIV is the causative pathogen of Acquired Immunodeficiency Syndrome (AIDS).

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Reasons for the HIV-1 epidemic

So, the HIV-1 jump to humans occurred as early as the 1920s, but the AIDS epidemic didn't start until the early 1980s. Some things I don't understand about this: Why the delay? What is needed for a ...
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Can HIV mutate to become airborne?

HIV has a very high mutation rate due to its inability to correct errors in DNA replication and it is very adaptable to its environment. Hence I wonder whether is it possible for it to mutate such ...