As puffs of smoke fill the air, two teenagers, one male and one female, smoke an e-cigarette while sitting against a tiled wall.

Californians – including minors – are still able to buy flavored electronic cigarettes online, even after the state’s much-publicized ban went into effect. That’s the key finding of my team’s new study, published in JAMA Network Open[1].

On Dec. 21,

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