Himself a vaper and a smoker. Two in one, in general.
I will say this: everything that you breathe except air is somehow harmful to the body (doctors will correct me and instruct me about cons, if this is not the case)
The main dangers of vaping:
It depends on what to soar with, how to soar and what to soar. Personally, I steamed "liquid" (base) without flavors, getting nicotine into my blood. Nicotine is a powerful neurotoxin that is dangerous to health. Don't inhale it, but you get harm. In more or less degree.
Flavors. Depending on their quality and price. You can steam ordinary food for 50-80 rubles, or you can buy already mixed liquids with really tasty flavors. What is the harm from food aromas? And really nothing, if they are of high quality. And yes, no one says that low price aromas are of poor quality. The main thing is not to soar on an empty stomach, or even gastritis is not far away.
In comparison with cigarettes (and I'm trying to replace cigarettes with vape), I use more nicotine, but there are no combustion products (I do not inhale saltpeter, paper, etc.). Steam is relatively safe for our body.
MOST IMPORTANT POINT: All this is personal observation and stories of close friends of smokers / vapers. So far, I have not seen studies on the dangers of vaping from doctors. For whom it is not difficult, I am waiting for a link to an article in a scientific publication or another four-thread.
As far as I understand, yes.
Firstly, it explodes and burns the faces of schoolchildren.
Secondly, oxidation products of glycerin, propylene glycol vapors and some flavors can be harmful health.
Thirdly, an irrepressible bather of nicotine liquids can easily overdose.
Fourth, inhalation of hot steam is in itself harmful to health.
B- fifth, some may go too far with their "law is not forbidden" and get in the horn.