"It is not known how much nicotine or other potentially harmful chemicals are inhaled by users, nor is it known whether e-cigarette use may lead to use of other tobacco products. Neither are the benefits of using e-cigarettes over traditional products known."

According to : "The average level of cotinine (metabolized nicotine) among nonsmokers increased by 456% and the average levels of the carcinogen NNAL increased by 112% after four hours of exposure to secondhand smoke in a smoke-filled casino with a "sophisticated" ventilation system."

The World Health Organization or WHO on Tuesday August 26th 2014 issued a report calling for the ban of indoor usage of electronic cigarettes claiming yet again there isn’t enough research done on these devices for it to be considered safe to use as well as being a potential gateway for children into nicotine addiction.

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