For some, e-cigarettes offer is disrupting the $800 billion global cigarette trade by providing a satisfying alternative to smoking. But on the other side, it has become a dangerous new way to attract kids and keep people stick to smoking.

The e-cigarettes have been around since 2007, but there impact was always neglected. The data showed that in mid-2000s, the share of Americans who considered themselves current smokers declined to about 20%.

In August, Public Health England (PHE) issued a 111-page report on electronic cigarettes, and it found that e-cigarettes are almost exclusively used by those who have already smoked and rejected the claim that they are attracting nonsmokers.

Based on the available information, PHE concluded that electronic-cigarette use is likely to be around 95% less harmful to health than smoking.

According to new data released last week by the Centers for Disease Control and Prevention (CDC), the proportion of American adults who smoke has fallen each of the past six years, from 20.6% in 2009 to 15.2% in early 2015.

Experts said that the fears among young people of becoming addicted to e-cigarettes serving as a ‘gateway’ to smoking remain speculative. Presently, there are at least 2 million ex-smokers using e-cigarettes in the United States.

So far, there have been no certainties of all of the long-term health impacts or benefits of e-cigarettes, but this doesn’t mean that we know nothing. Several thousands of experimental measurements have show that the important hazardous chemicals in combustion cigarette smoke are mostly not present in e-cigarette vapor.