More than 60% of U.S. adults who vape are interested in quitting, according to a study [...] And among those who vape to help them to quit smoking, some are successful while others continue smoking and using electronic cigarettes. According to the findings, former cigarette smokers had the highest intentions and interest in quitting. This is likely due to an increasing number of smokers using e-cigarettes to transition away from cigarettes, said the study's authors.