The National Centers for Disease Control announce a high incidence of pneumocystis and Kaposi’s sarcoma in gay men. These illnesses are later recognized as symptoms of a blood-borne immune disorder, which they name AIDS. The disease is initially thought to have developed in the late 1970s among gay populations, but scientists now know it developed in the late 1800s or early 1900s in Africa during the height of European conquest of the continent.