Exposure to vaping products — through friends, endorsements on social media or branded merchandise — makes students much more likely to vape, according to a study published in JAMA on Wednesday.

Driving the news: The study was published the same day Massachusetts Attorney General Maura Healey sued Juul, saying its early marketing campaign targeted teenagers with celebrity endorsements and ads on popular sites.

Between the lines: The JAMA study, which polled more than 4,000 students in New Jersey, confirmed that Juul is especially popular with teens.

  • Nearly 90% of high school e-cigarette users said they had used a Juul product in the past 30 days.

Go deeper: Juul's very bad, no good rotten year

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Ohio Gov. Mike DeWine tests negative for coronavirus after positive result

Photo: Justin Merriman/Getty Images

Ohio Gov. Mike DeWine (R) tested negative for the coronavirus after initially testing positive earlier Thursday, his office announced.

Why it matters: 73-year-old DeWine was set to meet President Trump Thursday on the tarmac at an airport in Cleveland and was tested as part of standard protocol. He is the second governor known to have contracted the coronavirus, after Oklahoma Gov. Kevin Stitt (R).

Updated 12 mins ago - Politics & Policy

Coronavirus dashboard

Illustration: Eniola Odetunde/Axios

  1. Global: Total confirmed cases as of 9:30 p.m. ET: 18,996,008 — Total deaths: 712,476— Total recoveries — 11,478,835Map.
  2. U.S.: Total confirmed cases as of 9:30 p.m. ET: 4,877,115 — Total deaths: 159,990 — Total recoveries: 1,598,624 — Total tests: 59,652,675Map.
  3. Politics: Pelosi rips GOP over stimulus negotiations: "Perhaps you mistook them for somebody who gives a damn" — Ohio Gov. Mike DeWine tests positive.
  4. Public health: Majority of Americans say states reopened too quicklyFauci says task force will examine aerosolized spread Study finds COVID-19 antibodies prevalent in NYC health care workers.
  5. Business: The health care sector imploded in Q2More farmers are declaring bankruptcyJuly's jobs report could be an inflection point for the recovery.
  6. Sports: Where college football's biggest conferences stand on playing.

Trump issues order banning TikTok if not sold within 45 days

Illustration: Aïda Amer/Axios

Americans and U.S. companies will be banned from making transactions with ByteDance, the Chinese owner of TikTok, in 45 days, according to a new executive order President Trump issued Thursday evening.

The big picture: Last week Trump announced his intention to ban TikTok but said he'd leave a 45-day period for Microsoft or other U.S.-based suitors to try to close a deal to acquire the popular video-sharing app.