Fentanyl is posing a serious danger across the U.S. The drug, which is 50 times more potent than heroin, kills an estimated 150 people a day.
But is the danger of the drug truly recognized and understood? The truth is that many people dying from fentanyl exposure didn't even know they were taking the drug.
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In "To Save a Life: A National Fentanyl Alarm," people share their stories to understand how we got here and how we solve the problem.
Watch the full special in the player above.