Rochester, Minnesota - A report by the Centers for Disease Control and Prevention (CDC) shows use of e-cigarettes by middle and high school students has tripled in one year. Traditional cigarette smoking declined but according to the CDC report about 25 percent of all high school students and 8 percent of middle school students used some form of tobacco. That's estimated to be more than four million young people.

Jon Ebbert, M.D., associate director for research in the Mayo Clinic Nicotine Dependence Center, says this is very concerning.