The Human Immunodeficiency Virus, also known as HIV, was discovered by Dr. Robert Gallo and Dr. Luc Montagnier. HIV had its first known case in a human in the year 1959. Though, its first known case in the United States was in 1981 when the Center for Disease Control and Prevention, known as the CDC, reported five homosexual men in Los Angeles, California with Pneumocystis Carinii Pneumonia, a rare form of pneumonia. These findings were published in CDC 'S Morbidity and Mortality Weekly Report, or