How do diseases like AIDS and HIV form? Why after thousands of years did it only show up in the 20th century?
In: Biology
Side note: HIV and AIDS are not two different diseases: HIV (Human Immunodeficiency Virus) _causes_ AIDS (Acquired ImmunoDeficiency Syndrome). So HIV is the virus that infects you, AIDS is the collection of symptoms you get once the HIV “breaks through”. Note that it can take years for the first symptoms to present after being infected.
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