Acquired Immune Deficiency Syndrome (AIDS) first came to the attention of the American public in the early 1980s. In several separate instances, mostly in the Los Angeles and New York City areas, young homosexual men required treatment for unusual types of cancer and/or pneumonia generally seen only in a small percentage of elderly men. Eventually, medical experts determined that the complex of such otherwise unusual illnesses was indicative of a weakened or deficient immune system, which caused the young victims to fall prey to a variety of otherwise unusual diseases. The term AIDS was eventuatly coined to refer to this disease complex, and, in short order, became part of common language.