The Nobel Prize in Physiology or Medicine 2005

Barry J. Marshall

Photo: C. Northcott

Prize share: 1/2

J. Robin Warren

Photo: U. Montan

Prize share: 1/2

The Nobel Prize in Physiology or Medicine 2005 was awarded jointly to Barry J. Marshall and J. Robin Warren "for their discovery of the bacterium Helicobacter pylori and its role in gastritis and peptic ulcer disease."

To cite this section
MLA style: The Nobel Prize in Physiology or Medicine 2005. NobelPrize.org. Nobel Media AB 2020. Sat. 28 Mar 2020. <https://www.nobelprize.org/prizes/medicine/2005/summary/>

Back to top Back To Top Takes users back to the top of the page

Learn more

Nobel Prizes 2019

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

Explore prizes and laureates

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