Margaret Heckler & Robert Gallo - 1984 Press Conference
April 23, 1984: AIDS Discovered - www.NBCUniversalArchives.com
HIV AIDS Researcher Dr. Robert Gallo
Origin of HIV, or Where Does HIV Come From?
AIDS was first clinically observed in the United States. The initial cases were a cluster of injecting drug users and homosexual men with no known cause of impaired immunity who showed symptoms of Pneumocystis carinii pneumonia, a rare opportunistic infection that was known to occur in people with a very compromised immune system.