But just 24% of dual users quit nicotine completely within two years, compared with 25% of people who only smoke and 35% of people who only vape, researchers found. On the other hand, more than half (55%) of dual users switched to cigarettes only after two years.

Vaping while still smoking unlikely to help quitters: study People who vape while still smoking cigarettes are less likely to successfully quit than those who only do one or the other, a new study said on Wednesday.