BALTIMORE, MD - OCTOBER 07: Dr. Gregg L. Semenza M.D., Ph.D addresses the media and a large crowd from Johns Hopkins Hospital at a press conference after learning he won the Nobel Prize for Medicine on October 7, 2019 in Baltimore, Maryland. Semenza won the 2019 Nobel Prize in physiology or medicine along with with Dr. William G. Kaelin Jr. and Dr. Peter J. Ratcliffe for Hypoxia Discovery - "discoveries on how cells respond to low oxygen levels and have the potential to result in treatments for a variety of illnesses". (Photo by John Strohsacker/Getty Images)
