e-cigarettes

The state's attorney general accuses the companies of targeting children and failing to properly verify customers' ages. The state already filed a similar lawsuit against Juul.

North Carolina's top prosecutor expanded his efforts to halt e-cigarette sales to teens on Monday by suing eight more manufacturers of vaping products.

North Carolina public schools have added a picture of an electronic cigarette to their "no smoking" signs. 

Among the possibly harmful compounds are "acetals," which form when some ingredients combine on the shelf, researchers say, and can inflame airways when inhaled.

A study shows the main drivers of Juul's social media presence are young people and third-party vendors, not the company itself. And vaping continues to look cool online among young people.

San Francisco supervisors say they need to protect kids and teens from becoming addicted to nicotine. The dominant vaping company, Juul, is headquartered in the city and hopes to overturn the ban.

New findings about the health effects of e-cigarettes add to a small but growing body of research that undercuts the widely presumed safety of the alternative to conventional cigarettes.