Answer: AIDS was discovered in 1981.
Step-by-step explanation:
AIDS (acquired immunodeficiency syndrome) is a disease characterized by the loss of body's immunity, which increases the chances for infection and malignancy. It is caused by HIV (human immunodeficiency virus).
Although HIV had existed in the United States during 1970s and originated years earlier, it was in the early 1980s that the disease came to the public's attention.
In 1981, the Centers for Disease Control and Prevention (leading public health institute of the United States) reported that five homosexual men became infected with Pneumocystis pneumonia, which usually affects people with compromised immune systems. In 1982, The New York Times published a text regarding the new immune system disorder, of which 136 people had died.