Health effects of electronic cigarettes Wikipedia More than 16 million children live in states where they can buy e cigarettes legally CDC Online Newsroom CDC E cigarettes are NOT safe and vaping harms health, World Health Organization rules Nothing good comes from smoking , and vaping isn't a safe alternative. E cigarettes often contain nicotine and other harmful substances, and studies show that young people who vape are more likely to In secondhand vape, scientists smell risk American Heart Association