The number of middle and high school students trying electronic cigarettes has doubled since last year according to the first large national study looking at use within that age group.
About 2 percent of students said they’d used an e-cigarette in the previous month, according to a survey done last year. This is up from 1 percent in 2011.
More kids still smoke traditional cigarettes than the new electronic ones, and it's not clear how dangerous e-cigarettes are. It's also not clear from the report how many are using them on a daily or weekly basis.
But health officials are worried. The new study suggests many kids are now getting a first taste of nicotine through e-cigarettes and then moving on to regular tobacco products, they say.