Final answer:
The HIV/AIDS virus first appeared in the 1980s.
Step-by-step explanation:
The HIV/AIDS virus first appeared sometime in the 1980s. HIV stands for Human Immunodeficiency Virus, which is the virus that causes AIDS (Acquired Immunodeficiency Syndrome). It was first identified in the early 1980s in the United States, but it is believed to have been circulating in several African countries before that.
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