That article is not the actual research. It's just an opinion piece ABOUT the actual NYU study.
Here is the ACTUAL ORIGINAL study by Moon Sung Tang. Have a read - your article conveniently left out a few parts and misrepresented what was found.
https://www.pnas.org/content/115/24/E5439
And accompanying article from that same research paper site.
https://www.pnas.org/content/115/24/E5439
"Shedding some light on this matter, side-by-side experiments have shown that oral and lung cells exposed to electronic cigarette aerosol have significantly lower levels of DNA damage than those exposed to tobacco smoke."
"Altogether, these data support the notion that electronic cigarette use increases cancer risk but is still safer than combustible tobacco."
So basically it's the nicotine over prolonged period that's bad - in both vapor and cigarettes. Yea obviously vapor or smoking are not great for health. However, cigarettes are still
FAR WORSE.
And this is coming from a Cig smoker who has been for over 20 years.