There definitely is a concern, because there will be nicotine in these products once Bill S-5 is passed, and who is to know what will happen in terms of addiction from choosing to use either an e-cigarette or a tobacco product? From research that came out and was published by CMHA, we do know that youth who use e-cigarettes are more likely to be using tobacco products a year later.
On February 12th, 2018. See this statement in context.