Murthy V. JAMA Pediatrics 2017; 171(3): 209-210 doi:10.1001/jamapediatrics.2016.4662

1 in 6 high school students in the US now use e-cigarettes.  These devices contain nicotine, flavourings and other additives and their use now surpasses that of traditional tobacco products such as cigarettes, cigars, chewing tobacco and hookah.  This article provides an accessible summary of the extent of use and risks associated with e-cigarettes.

http://jamanetwork.com/journals/jamapediatrics/article-abstract/2592300