Too much unknown.
Which is true. Burden of proof that e-cigs are safe lies in the hands of people engaged in this business. Not Health Canada. Much like in the pharmaceutical business. In short, present scientific evidence that they're safe, then and only then will we see HC act upon it.
HC will not accept any scientific evidence unless it is produced by a pharmaceutical company. And, yes, this IS politically motivated.
A couple years back the University of Alberta Public Health Department ran a study on electronic cigarettes under the supervision of Dr Carl Phillips. His results were very positive and he has since become an outspoken advocate for ecigs and other harm reduction techniques for smokers. (Dr. Philips is not a smoker).
Other scientific studies have been carried out right around the world (US, UK, Australia, New Zealand - to name a few). EVERY study shows ecigs as safe.
Eliquid is composed of PG and/or VG, flavoring (free from diacytle, oil and sugar).
PG has been studied since 1940 and declared safe for inhaling. It's one of the most widely used ingredients in medicine, food, air systems and fog machines. Fewer studies have been done on VG - but nothing of note has been seen yet to indicate that inhaling VG vapors is damaging.
HOWEVER - the whole point of ecigs is that they are
SAFER than cigarettes. Even if they were a little bit safer - that might be something. That they are a whole lot safer - that's something else.
Quote from the article "So if you're trying to get rid of an unhealthy, dangerous, habit, why would you inhale something that you really don't know for sure, that it is safe?" - completely misses the point.
I would counter: "Why deny people addicted to a deadly product, that is legal and available everywhere a replacement product that is shown to be far safer and not deadly. It's like telling a recovering alcoholic that he can't have juice or coffee cause it might harm his health as no pharmaceutical company has scientifically proven otherwise."