There are a lot of unknowns as to the long term effects of
vaping. 10 years from now we may all end up with some new disorder from it. "Vaper's Lung" or "ecigganitis", or some such crap, but it's doubtful. All the REAL science so far points to
vaping as being relatively safe in the short term. Who knows. But vaping for me, and for many other folks, is the only successful way to stop smoking tobacco, a habit for which the dangers ARE known and are LETHAL.
As stated above, all the junk science about formaldehyde from vaping has been debunked. No one vapes at 7000 degrees or whatever the temp is where PG morphs. As far as DA/AP, the levels found in the flavorings some vapers use are MUCH lower than the levels of the same toxins found in cigarettes. As far as I know, no one ever got "popcorn lung" from cigarettes, so I'm not super concerned with that.
The bottom line is that the government, big tobacco,the medical industry, and big pharm all make hundreds of BILLIONS of dollars off of folks that smoke cigarettes. Tobacco sales, and thereby tax dollars, have actually started to decrease since vaping became more popular. And drug companies and medical corporations see the writing on the wall about the future where fewer and fewer folks will need their cancer and COPD meds and treatments. It's making them fear the future, so they are throwing millions into the anti-vaping propaganda, trying to strike fear into the sheeple. 90% of the folks out there will believe anything they see on TV 3 times, so a 30 second commercial played once every half hour during prime time for a month is a powerful tool. Vaping is a new industry and hasn't the resources to fight back with truthful campaigns of our own. The government is funded (both above and below the table) by these industries, so they have the power (and by power I mean money) to sway (buy) the votes of the politicians who control the fate of the people. And when millions of dollars in campaign contributions (bribes) are threatened, the politicians react by spouting fearmongering crap to sway the opinions of the ignorant masses. It's a practice as old as civilization itself. The only reason they get away with it is that most people are inherently apathetic. As long as they can drive their cars and watch Will Farrel on their 700" pflat screen TVs while sitting in their quarter million dollar homes, they don't care.