A study at the University of Waterloo suggests that vaping among Canadian teens has skyrocketed by 74 percent in a single year and that new brands of e-cigarettes are gaining a foothold following federal legislation. Professor David Hammond, who led the study of youth vaping in Canada, the US and the UK said the findings reflect the risks of the “newest evolution of vaping.” The researchers say an online survey found the number of Canadian participants aged 16 to 19 who reported vaping in the previous month rose from 8.4 percent in 2017 to 14.6 percent last year. Rates of weekly use climbed to 9.3 percent from 5.2 percent over the same time period.
