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  • UP NEXT

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  • Can children catch RSV twice in the same year?

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  • Author talks new book about teaching your family gratitude

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  • Stress-fighting breathing techniques to help handle anxiety

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  • How to gather safely for the holidays amid tripledemic fears

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  • Clinical trial reveals effectiveness of mindfulness vs. antidepressant

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  • Tripledemic fears rise as flu cases swamp pediatric hospitals

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Is ‘Juuling’ safe? What’s really inside the popular e-cigarette

05:59

The debate about e-cigarettes is reaching a boiling point, with the FDA saying this week it has “hard data to support that a public health tragedy is now underway.” NBC senior investigative and legal correspondent Cynthia McFadden does a deep diver into the science behind them, particularly the biggest e-cigarette maker, Juul, and a leading scientist’s study.