E-cigarette usage nearly doubles in U.S. high-schools: survey

The percentage of high school seniors who used e-cigarettes in the last 30 days nearly doubled to 20.9 percent from last year, results of a survey released by the National Institute on Drug Abuse showed on Monday. The increase in vaping by 10th and 12th graders was the largest year-over-year jump for any substance ever measured by the survey, which started 44 years ago.

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