There are concerns over increases in vaping among North American youths.
In the US in 2019, one-fifth of 10th-grade students and one-quarter of 12th-grade students reported using e-cigarettes in the past 30 days. The extent to which similar increases have been observed in countries with different regulatory environments, such as Canada and England, is an important question. In 2018, Canada loosened restrictions on the sale and marketing of nicotine-containing e-cigarettes, whereas e-cigarettes in England are subject to more comprehensive regulations than in either Canada or the US.
David Hammond, Vicki L. Rynard, Jessica L. Reid – JAMA Pediatrics – May 4, 2020.