Kids who vape more likely to smoke marijuana

Young people who use e-cigarettes have a higher risk of also using marijuana.

That is according to a new study from Boston's Children's Hospital. 

Researchers analyzed 21 studies involving more than 128-thousand young people ages 12 to 24.

Those who vaped were three and a half times more likely to have also used marijuana at some point. 

That is compared to the teens who did not vape. 

The association of e-cigarettes and marijuana use was higher in the younger teens.

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