Teens who use electronic cigarettes are more likely to start smoking regular cigarettes – and they are likely to use both products more often over time, a new study found.

The Rand Corporation study looked at more than 2,000 youths in California, starting when they were teenagers and continuing until they were young adults. “Not only are adolescents who start vaping more likely to start smoking in the future, but they’re also likely to go on and use e-cigarettes and cigarettes more frequently,” said Michael Dunbar, [...]