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No longer the hot new thing? Teen vaping falls, study says

NEW YORK — Teen vaping, which had been skyrocketing, fell dramatically in the United States last year.

A government survey released Thursday suggests the number of high school and middle school students using electronic cigarettes fell to 2.2 million last year, from 3 million the year before.

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Health officials have worried about the booming popularity of vaping products among kids and the potential impact on adult smoking rates in the future.

‘‘It certainly is a public health win,’’ said Brian King, an expert on smoking and health at the Centers for Disease Control and Prevention.

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It’s the first decline CDC has reported in teen vaping since the agency began tracking it in 2011. The findings echo a recent University of Michigan survey, which detected a decline in 2016.

It’s unclear why teen vaping fell last year, and it’s too soon to know if the numbers will continue to drop.

One possibility may be a growing push to ban sale of e-cigarettes to minors, including a federal regulation that took effect in August. Another may be the influence of ad campaigns by the government and other organizations to discourage youths from smoking, the CDC said.

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