These chemicals often contained glutaraldehyde, methanol and formaldehyde
It even changed the official Chinese translation of a United Nations anti-tobacco treaty to weaken it
While the long-term health effects of inhaling these chemicals are still being researched due to the newness of the product, any inhalation or exposure to these compounds at any level is detrimental to respiratory health, especially that of the developing adolescent
Chemical composition of electronic cigarette e-liquids: overview of current evidence of toxicity
However, health risks include respiratory symptoms, lung damage, and potential development of chronic obstructive pulmonary disease similar to tobacco
Murchison, "Significance of the American Tobacco Company Case." North Carolina Law Review 26 (1947): 139+ online