Inhaling super heated ANTIFREEZE (propylene/ethylene glycol) plus glycerin is dangerous enough on its own. Then you add in FLAVORINGS, meant to be eaten, not inhaled,
METAL MICRO PARTICLES from the heating element, CHEMICAL NICOTINE, and the CONTAMINATED MJ full of SOLVENTS, FUNGICIDES, MOLD and BACTERIA, now you have a recipe for lung damage, emphysema, and possibly DEATH. One of the contaminants in MJ is a fungicide that releases Hydrogen Cyanide when heated and inhaled, killing people in record time
Vaping has not been studied enough, and no one has studied the results of heating all these ingredients alone or together on the lungs.