What substances are behind rash of vaping-related illness?
Clip: 12/11/2019 | 8m 28s | Video has closed captioning.
State governments continue to crack down on flavored e-cigarettes and other vape products, largely in response to the deaths and illnesses that began coming to light this past summer. But as lawmakers deliberate over their policy response to vaping, researchers are still trying to understand the cause of the illnesses. Science correspondent Miles O’Brien reports.
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