RICHMOND, Va. (AP) -- The head of the Centers for Disease Control and Prevention's smoking and health office says increased use of electronic cigarettes underscores the need for regulation.
A study released Thursday shows nearly six in 10 adults in the U.S. are aware of the battery-powered devices that heat a liquid nicotine solution and create vapor that users inhale.
The CDC report also says about one in five current smokers reported having used an electronic cigarette.
Some of the nation's largest tobacco companies have gotten into the e-cig market as part of the industrywide push to diversify beyond the traditional cigarette business.
The Food and Drug Administration says e-cigarettes have not been fully studied. It is expected to assert regulatory authority over e-cigarettes later this year.