The e-cig revolution is catching on as more and more US high school students are vaping and less are smoking, as word about their health benefits is spreading.

Kids seem to be getting the message. Just over one in ten students smoked cigarettes in 2015, compared with one in four in 1991, the U.S. Centers for Disease Control and Prevention have reported.

The survey – entitled the National Youth Risk and Behavior Survey – monitored the activity of 15,000 high school students.

According to Patricia Folan, director of the Center for Tobacco Control at Northwell Health, New York, believes there are a multitude of factors that are contributing to the decline of smoking.

Folan listed environmental tobacco bans, increased taxes on cigarettes, anti-tobacco media and the removal of point-of-sale advertising in stores as possible causes.

But a major factor that escaped Folan’s list was e-cigs. Almost 25% of high school students said they had vaped in the past 30 days, and 45% had tried an e-cig in their lifetimes, the study found.

This shows that e-cigarettes are considerably more popular than regular cigarettes among US high school students.

Dr. Len Horovitz, a pulmonary specialist at Lenox Hill Hospital in New York City, fears that e-cigs could transition youngsters from vaping to smoking.

Similarly, Folan feared that e-cigs appeal to children thanks to their wide and diverse range of flavours.

Interestingly, e-cig use is vastly higher among teens than it does among adults. It has been reported that only 4% of working US adults use e-cigs.

California recently regulated e-cigarettes, raising the legal vaping age from 18 to 21. As a result, some youngsters quit vaping for smoking.