After more than 30 years of smoking, all I have now is my E-Cig. O2 blood level 99 and my lungs have never been better. My cardiac Doc is thrilled with them. If it is dangerous then so are the patches and gum.
Wifey and I went the ‘Vapor4Life’ route almost two years ago....all our docs are aware and have not hinted that we stop using ‘em.