HIV/AIDS

In this April 23, 1984 file photo, Dr. Robert Gallo, right, chief of the National Cancer Institute laboratory of Tumor Cell Biology, along with Health and Human Services secretary Margaret Heckler talks to reporters in Washington, where they announce that the probable cause of Acquired Immune Deficiency Syndrom (AIDS) has been found, a cancer virus called HTLV-3. The awarding of the Nobel Prize in medicine to Dr. Luc Montagnier, Monday, Oct. 6, 2008, recalls a dispute in the 1980s over who deserved credit for discovering HIV and the resulting test to screen blood for it.