The percentage of high school seniors who reported vaping marijuana within a month of being surveyed jumped from 7.5 percent in 2018 to 14 percent in 2019, according to a study published today in the Journal of the American Medical Association.
The analysis indicated that this was the second largest single-year jump for teen use of any substance since the survey began in 1975 – second only to another vaping-related increase, of nicotine use, between 2017 and 2018.