"Studies like this give further confirmation that e-cigarettes are not harmless," said European Society of Cardiology cardiovascular prevention spokesperson Professor Joep Perk.

"If I was a minister of health I would put my efforts into public anti-smoking campaigns especially directed towards the younger generation, and not promote e-cigarettes as an alternative to smoking," he continued. "There are studies also showing that people that start with e-cigarettes have a tendency to become persistent tobacco cigarette smokers as well."

https://www.sciencedaily.com/releases/2017/02/170201112524.htm

Ecigarettes not harmless