About 40 percent of high school students who said they used tobacco said they used two or more types of products, a 23 percent increase.
About 15 percent of them vaped and smoked cigarettes, according to the survey. Over the course of a year, the number of high school students using tobacco products increased by about 38 percent, the Centers for Disease Control and Prevention found.
E-cigarettes drove the increase, the CDC said. Use of other products remained stable.
In 2018, nearly 21 percent of high school students, or 3 million, vaped. Source: CDC blames spike in teen tobacco use on vaping, popularity of Juul