Food and Drug Administration Commissioner Scott Gottlieb on Wednesday declared youth vaping an "epidemic," and said the agency will halt sales of flavored electronic cigarettes if the major manufacturers can't prove they are doing enough to keep them out of the hands of children and teens.

The FDA says it's giving manufacturers of Juul, Vuse, MarkTen XL, Blu and Logic 60 days to submit “robust” plans to prevent youth vaping. If the agency doesn’t think their plans go far enough, it could order their products off the market. Those five brands make up more than 97 percent of the U.S. market for e-cigarettes, FDA says.

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