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A woman holding her stomach while talking to doctor
Anal bleeding is the most common sign of colon cancer in young people, yet also one of the most taboo to talk about.
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The new strain of bird flu has infected more than 90 million chickens and has spread to dairy cows and even humans. Here's what you need to know about the "global pandemic for animals."

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Marathon runners
The man (not pictured) tried many treatments but his pain got worse.