The New York Times released an article on April 2nd titled, "‘I Can’t Stop’: Schools Struggle With Vaping Explosion."
The article highlights how the ENDs industry has touted e-cigarettes and other similar devices as cessation tools for adults, yet problematic usage has exploded among adolescents. JUUL devices were emphasized as particularly problematic because of their high nicotine content, high addiction potential and flashdrive-like design. Research is still in progress on whether e-cigarettes are harmful to one's physical health. However, there is data that teens who use ENDs have higher levels of carcinogenic chemicals such as diacetyl in their urine, compared to those who do not use them. Additionally, teens who have used e-cigarettes are 4 times more likely to have also smoked tobacco cigarettes.
You can read the full article here.