e-cigarettes

Updated at 6:43 p.m. ET.

San Francisco could become the first city in the nation to ban flavored tobacco products from all store shelves. The ban includes everything from candy-flavored e-cigarettes to conventional menthol smokes.

Lindsay Fox / EcigaretteReviewed.com

Newly published research suggests that more than 10 percent of Oklahomans vape–the highest rate in the country.

Researchers at the New York University School of Medicine found that states with strong tobacco-control laws, like smoke-free air rules and taxes on cigarettes have fewer e-cigarette users.

The study’s lead author Omar El-Shahawy says Oklahomans are more likely to try e-cigarettes because smoking is socially acceptable and allowed in a lot of locations.

After a series of "mishaps," the Navy says it will no longer allow sailors to bring electronic cigarettes onto its ships, submarines, aircraft, boats, craft and heavy equipment.

"The prohibition applies to Sailors, Marines, Military Sealift Command civilians and any personnel working on or visiting those units," according to a statement obtained by NPR's Sarah McCammon, issued by the commanders of the U.S. Fleet Forces and the U.S. Pacific Fleet.

The U.S. surgeon general said Thursday that e-cigarette use poses a significant and avoidable health risk to young people.

"We already know that e-cigarettes have the potential to cause lasting harm to the health of young users," said Surgeon General Vivek Murthy. "Most contain nicotine, a highly addictive drug that can damage normal development of the brain – a process that continues until about age 25."

Murthy's comments were part of a report released Thursday on rising e-cigarette use by people under 25.

Removing any doubt about whether you're allowed to puff away on an electronic cigarette while airborne, the Department of Transportation has explicitly banned vaping on commercial flights.

Flickr / Fried Dough

State health officials say Oklahoma's adult smoking rate is continuing to decline, dropping nearly 20 percent over the past four years to a new all-time low.

Survey results released Tuesday by the Oklahoma State Department of Health show the number of Oklahomans who smoke dropped to 21 percent in 2014, the state's lowest rate ever. The decline moved Oklahoma's ranking from 46th out of 50 states in 2013 to 40th last year.

It's become an emotional debate: Do e-cigarettes help people get off regular cigarettes or are they a new avenue for addiction?

Until now, there has been little solid evidence to back up either side. But a new study from the Centers for Disease Control and Prevention could help fill that void.

Once a smoker always a smoker, right? Not quite.

As the number of smokers drops, the remaining smokers actually smoke less and are more likely to quit, according to a study published Wednesday in the journal Tobacco Control.

"In the last 18 months, the number of vaping shops in [Oklahoma] jumped from a handful to 300, with names like Vapor Haven, the Vape Hut, Vapor World, Creative Vapor and Patriotic Vapes."