It is commonly believed that electronic cigarettes are better for you than normal cigarettes, but the information is different than this analogy as there is little scientific evidence to back this claim up. Even the World Health Organization has cautioned about the risks of using electronic cigarettes and the FDA has also stated that they may be safer than normal cigarettes. So until further research comes along there is no conclusive evidence to support these claims.
How does vaping affect your lungs?
According to the medicalnewstoday “Vaping and DNA damage. Research published in January 2018 found that mice exposed to e-cigarette vapor displayed DNA damage in the lungs, bladder, and heart. This damage may increase their risk of cancer, heart disease, and lung problems.”
A link to that study on mice can be found here