Ok. Well I've been vaping pretty heavily for two years. Not even basic ecigs like most people, hobby rebuildables that probably output at least ten times as much vapor. Zero problems. Ill go head to head on a spirometer with any smoker any day, and I don't even exercise. I never cough, even when smoking the occasional blunt, and when taking massive vape bong rips. Meanwhile my smoker friends constantly get sick, and getting stoned with them is embarrassing listening to the constant choking and coughing. Its pretty clear which is worse lol.
I was born with a pneumonia, I've had pneumonia 3 times and bronchitis 5 times before I was 18 because i was smoking since 12. I get bronchitis very easy, i got it at 22 after smoking something like 200 blunts in a few days (split between friends). It's pretty obvious vaping is nearly harmless.
So basically I don't believe the bullshit lol.