The Health section of the November 1, 2016 New York Times points out that an increasing number of studies are claiming that vaping is safer than smoking, and that most Americans are unaware of this info. The article states:
...mounting evidence suggests vaping is far less dangerous than smoking, a fact that is rarely pointed out to the American public.
The Times also points out that...
...a growing number of scientists and policy makers say the relentless portrayal of e-cigarettes as a public health menace, however well intentioned, is a profound disservice to the 40 million American smokers who could benefit from the devices. Smoking kills more than 480,000 Americans a year.
“We may well have missed, or are missing, the greatest opportunity in a century,” said David B. Abrams, senior scientist at the Truth Initiative, an antismoking group. “The unintended consequence is more lives are going to be lost.”