Well, living is killing you, too, just slower than smoking.....LOL.....No long term studies are in regarding vaping and life expectancy, but the general consensus is that vaping is not harmful. It is generally thought that nicotine by itself is not much of a danger, about the same as caffeine. It is all the additives in cigarettes that are extremely harmful. You will live much longer and have better quality of life with vaping as opposed to cigarette smoking. You might live forever in a plastic bubble with no bad habits, but it certainly would be dull..........LOL
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