vaping as far as i know is not inherently harmful, nor is nicotine. Well not to a level i consider harmful. Let me explain what i mean by that...
Smoking would have killed me if i continued. guranteed 100% your toast, family history of cancer and all... Now the withdrawls i have personally expirenced from quitting smoking with other methods...
Downsides:
I became voilent(nearly got fired from a job)
i became severely depressed
i had constant headaches
I ate more, and thuis gained considerable weight(possibly due to both depression and eating)
the upsides:
i could smell
taste
walk up stairs without becoming short of breath
it made my wife happy(biggest reason honestly)
my house did not smell
i did not smell
my curtains could be washed once a year instead of once a month.
my white painted walls will stay white.
now we move on to the reasons to vape.
i get nicotine in a considerably less harmful method, that in all likely hood will NOT kill me. I no longer have a constant urge to smoke, and even when i do, i vape.
The reason any of us got into using a pv is simple...its a risk vs benefit analasys of cigarettes vs PV's. PV's are safer than cigarettes, simple as that. Would you not want to continue something you enjoyed doing in a safer manner? lets use the parachute example. I was in the 82nd airborne for nearly 6 years. I have jumped out of airplanes and helicopters over 140 times. it was one of the most enjoyable things i have ever done in my life. It also ended my military career when i injured both knees. If there was a safer method i would have taken it. The military is constantly looking for safer ways to make it's airborne divisions work. So based on that example if you were given the choice of a parachute and one rig did not have a reserve what would you take? I mean parachuting is fairly safe, but would you not want the reserve just in case? Why would you want it ? because its safer right ?
cigarettes will kill you, vaping is not likely to as far as anyone knows. unless of course they are vaping at 1.21 jiggawatts!
if i were to do a risk analysis on someone who wanted to vape and had NEVER smoked in their life..it would be easy. You have no risk now, but you want to add the possibility of risk ..why? There is no conceivable reason a NON SMOKER should ever vape, even 0mg. The only reason they might want to is to have fun with the device, or look cool with their friends. But honestly if they have never had a desire to smoke there is no point. They would honestly be better off smoking this one plant i heard smells really good.
oh and if you want to know what "other" things can happen with nicotine..
Let me google that for you
you will find both ends of the spectrum via that link. Have fun!