New data suggests teen smoking rates in Canada are also rising. As he tallied his latest data on vaping rates among Canadian teens, University of Waterloo Prof. David Hammond tried to find reasons not to believe his own research.

That's because the results were troubling.

According to his numbers, Canadian teenage vaping rates have increased substantially, similar to the dramatic increase in the U.S. where rates shot up by 80 per cent in one year, a trend the FDA called "epidemic."