I have COPD and have vaped for close to ten years. Switching from smoking to vaping improved my lung function (documented by pulmonary function tests) and although my lung doc would prefer I not put anything in my lungs but air, he grudgingly will admit it's done me some good.

I make my own e-liquid and have for about nine years. I know what works for me and know exactly what's in it because I made it :)

Battery explosions? Those are almost without exception people who try to cheap out on e-cig batteries and install batteries that can't handle the current drain of an e-cigarette atomizer, which in the days of subohm vaping is extremely high current drain.

The couple thousand people who got sick from vaping - apparently there's a link to using Vitamin E as a thickener in black market THC vape liquid.

Moral of the story? Know what you're putting in your body :)