The 2019 Nobel Prize for Physiology or Medicine was awarded to ___________ scientist for their discoveries in how the body’s cells sense and react to oxygen levels:

A. Dr William G Kaelin Jr
B. Dr Gregg L Semenza
C. Peter J Ratcliffe
D. All of above

The Nobel Prize in physiology or medicine was awarded Monday to three physician-scientists from the United States and Britain – William G. Kaelin Jr., Peter J. Ratcliffe and Gregg L. Semenza – “for their discoveries of how cells sense and adapt to oxygen availability.”