@Thulium
Yes, I agree, but am not concerned about the nicotine content in any way since there are at least two hundred years of data that clearly tell us that consumers are well able to self-regulate their stimulant intake safely even when those stimulants have a powerful pharmacological effect. People do not poison themselves to death with coffee, at least in significant numbers.
It seems to me that the toxicology implications for e-cigarettes will be marginally more serious than those for Snus, due to the range of individual formulations, some of which may not be entirely irreproachable. However, the implications of toxicological variations do not seem of great import - especially compared to smoking, of course.
What is of more concern to me are simple mechanical issues with the lungs. I feel that there is more potential for individual intolerance to various ingredients here, and given that I have some personal experience of this, am unwilling to dismiss it. Statements that "e-cigarettes are entirely harmless" are, I think, less accurate than similar statements made about Snus - for which there are, at least, two and a half decades of research that can be referenced. We only have five years for e-cigarettes and that difference is significant.
In addition, there is also the problem that persons with preexisting lung disease due to smoking will inevitably add to the confusion. At some stage there will be a much wider debate about whether or not those with smoker's lung (emphysema, COPD) can legitimately use e-cigarettes, given that it will take a great deal longer to evaluate the effects, and that subsequent deaths might be attributed to the preexisting disease or e-cigarettes.
It seems that Snus-related deaths are statistically insignificant, despite the large numbers of users in Sweden for 25 years. I do not have the same confidence regarding e-cigarettes, mainly due to some basically simple lung questions. But these comments need to be taken in context: all I am saying is that statements that e-cigarettes are absolutely safe, which is something that it appears can now be said about Snus, may be slightly premature. And in comparison to smoking, it is probably already safe to say there is no risk, in statistical terms.
If 650,000 die each year from smoking in the EU, and if every smoker switched to an e-cigarette and there were then 65 deaths, then the risk is statistically negligible at 0.01% of the previous rate, and at such a small percentage of the total smoking population that it is virtually invisible. But still, probably, higher than would be the case if all smokers switched to Snus (in my opinion).
Anyway, what we do know is that the refusal of the EU to allow and promote Snus use, and their apparent intention to do the same with e-cigarettes, is equivalent to mass murder - and can only be the result of corruption, since no one in their right mind would take those actions. You have to be paid, to ignore death on that scale, to ban the only proven solution, to try to ban the most promising solution ever seen, and to promote pharmaceutical remedies that are proven not to work.