While Dr. Glantz's statement that few people have switched away from cigarettes or used e-cigarettes as a bridge to eventually go off cigarettes was not science-based, but pure speculation, there are now two studies which actually examine the trajectory of electronic cigarette and conventional cigarette use among a cohort of e-cigarette users. We are able to empirically examine Glantz's dual use argument and his claim that very few smokers are using e-cigarettes as a bridge to eventually go off cigarettes.

3. CDC web site

In other words, despite acknowledging that they cannot tell from their study whether e-cigarette use precedes smoking or whether smoking precedes e-cigarette use, they nonetheless draw the conclusion that e-cigarette use precedes smoking.

According to a new published in the International Journal of Environmental Research and Public Health, asthmatic smokers who use electronic cigarettes experience an improvement in their asthma symptoms and lung function, even if they remain dual users.

LAST：vision x.jet mini nova |NEXT：vision spinner 1300