To each his own...
Any new chemical put into a body will have some effect. I'll stick with my black coffee.
I won't disagree with that. Vaping isn't about being 100% safe, that would be quitting all together. Its about harm reduction. Cigarette smoke has close to 7,000 different chemicals in it, most of which are toxins and many are cancer causing. Vaping, though it does have some chemicals in it, most are declared safe (propylene glycol and vegetable glycerin have been proven safe for vaporization and inhalation many years ago due to actors concerns over fog machines. Nicotine doesn't change its chemical structure when vaporized and in the small doses used in eliquid is safe). To me its like skydiving. Regardless of how you do it, skydiving can be dangerous. Smoking is skydiving without a parachute while vaping is having a parachute and two backups, its that much safer.