I think it's bullshit what they are talking!
I myself are a vaper for more than 3 years.
Vaping itself MUST be less harmful then smoking cigs, simply due to the fact, that you have the same ingredients in the liquid as they are present in the cigs.
Liquid contains mostly substances called: Glycerin, nicotine, water and flavours if you choose to have any.
All those substances are present in cigarettes. Further the cigarettes give of the wanted nicotine through combustion which BURNS the tobacco at higher temperatures, creating way more chemical reactions then the electric cigarette.
On the other hand: our vaping devices heat the liquid to a way lesser temperature where those chemical reactions don't even occur.
Keep in mind, that nicotine is a nervous poison and that long-term effects of it are only thoroughly researched in combination with the combustion of tobacco products. But the healthy understanding of basic chemistry tells me, that it is way less harmful then smoking cigs. Best would be to stop consuming nicotine at all, but who is willing and able to do so? It's one of the most addictive drugs known to man.
If you guys are interested in this kind of topic I advise you to search for the study made by the UK health ministry. They claim E-cigs to be 95% less harmful then their counterpart.
RE: Vaping potentially as harmful as tobacco cigarettes? - A study by chemists at the University of Connecticut