Medical researcher who discovered that human immunodeficiency virus (HIV) led to acquired immune deficiency syndrome (AIDS).
He received his Bachelor of Science degree in Biology from Providence College in 1959.
He co-founded and became the director of the Institute of Human Virology (IHV) at the University of Maryland School of Medicine.
His parents, working-class Italian immigrants, had him at a hospital in Waterbury, Connecticut.
In 2007, the Bill and Melinda Gates Foundation gave him a $15 million grant.