The Nobel Prize in Physiology or Medicine 2019

William Kaelin official Nobel portrait

© Nobel Media. Photo: A. Mahmoud

Prize share: 1/3

Sir Peter J. Ratcliffe

© Nobel Media. Photo: A. Mahmoud

Prize share: 1/3

Gregg L. Semenza

© Nobel Media. Photo: A. Mahmoud

Prize share: 1/3

The Nobel Prize in Physiology or Medicine 2019 was awarded jointly to William G. Kaelin Jr, Sir Peter J. Ratcliffe and Gregg L. Semenza "for their discoveries of how cells sense and adapt to oxygen availability"

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Coming up

This year’s Nobel Prize announcements will take place 2–9 October. All announcements will be streamed live here on nobelprize.org.

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Announcement dates

Explore prizes and laureates

Look for popular awards and laureates in different fields, and discover the history of the Nobel Prize.

Nobel Prizes and laureates

Fifteen laureates were awarded in 2019, for achievements that have conferred the greatest benefit to humankind.

Their work and discoveries range from how cells adapt to changes in levels of oxygen to our ability to fight global poverty.

See them all presented here.
2019 Nobel Laureates