Meilin Keen was diagnosed with stomach cancer at 26. She’s part of a growing demographic of people who are getting cancer diagnoses before the age of 50. And doctors don’t know why. WSJ’s Brianna Abbott explains what we know so far.

Further Reading:

-Cancer Is Striking More Young People, and Doctors Are Alarmed and Baffled. 

-Many Cancers Are on the Rise in the U.S., Even as Overall Deaths Fall. 

-Uterine Cancer Was Easy to Treat. Now It’s Killing More Women Than Ever. 

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