juul vape debate_00000000.jpg
juul vape debate_00000000.jpg
Now playing
03:40
Study: E-cigarette maker Juul triggers nicotine 'arms race'
Now playing
01:24
How Kyra Sedgwick got the cops called on Tom Cruise
Now playing
05:18
Anderson Cooper explains how he overcomes being shy
US Navy
Now playing
01:28
Pentagon confirms UFO video is real, taken by Navy pilot
Kristina Barboza
Now playing
03:09
Grieving mom's advice to other families: You can try to help, support and love
Fancy Feast/Purina
Now playing
01:06
Cat food company makes a cookbook ... for humans
Now playing
02:35
WWII veteran: End of the war was 'the biggest thrill of my life'
Google Earth's new timelapse feature
Google
Google Earth's new timelapse feature
Now playing
01:09
Google Earth's new Timelapse feature shows 40 years of climate change in just seconds
FOX/"The Masked Singer"
Now playing
01:23
'The Masked Singer' reveals identity of The Orca
LONDON, ENGLAND - DECEMBER 07:  A visual representation of the digital Cryptocurrency, Bitcoin on December 07, 2017 in London, England. Cryptocurrencies including Bitcoin, Ethereum, and Lightcoin have seen unprecedented growth in 2017, despite remaining extremely volatile. While digital currencies across the board have divided opinion between financial institutions, and now have a market cap of around 175 Billion USD, the crypto sector coninues to grow, as it continues to see wider mainstreem adoption. The price of one Bitcoin passed 15,000 USD across many exchanges today taking it higher than previous all time highs.  (Photo by Dan Kitwood/Getty Images)
Dan Kitwood/Getty Images
LONDON, ENGLAND - DECEMBER 07: A visual representation of the digital Cryptocurrency, Bitcoin on December 07, 2017 in London, England. Cryptocurrencies including Bitcoin, Ethereum, and Lightcoin have seen unprecedented growth in 2017, despite remaining extremely volatile. While digital currencies across the board have divided opinion between financial institutions, and now have a market cap of around 175 Billion USD, the crypto sector coninues to grow, as it continues to see wider mainstreem adoption. The price of one Bitcoin passed 15,000 USD across many exchanges today taking it higher than previous all time highs. (Photo by Dan Kitwood/Getty Images)
Now playing
03:07
Bitcoin has an energy problem
The new all-electric Mercedes-EQS
Mercedes-Benz AG
The new all-electric Mercedes-EQS
Now playing
01:05
See the new all-electric EQS luxury sedan from Mercedes
Now playing
01:32
Scientists turned spiderwebs into music and it sounds like a nightmare
Jeopardy Productions, Inc.
Now playing
01:02
Aaron Rodgers' Green Bay Packers question stumps 'Jeopardy!' contestants
Now playing
05:18
Coinbase CFO: We're an on-ramp to the crypto economy
CNN
Now playing
02:12
'Too dangerous to do anymore': Sacha Baron Cohen on Borat
John Avlon 0413 Wallace
CNN
John Avlon 0413 Wallace
Now playing
03:31
Avlon compares Tucker Carlson's comments to George Wallace
(CNN) —  

Adults living with children are more likely to vape than those without, putting kids at risk for what the authors of a new study describe as “the ‘new’ secondhand smoke.”

“These children are potentially exposed to secondhand aerosols, an amalgam of compounds with yet unknown health consequences,” the researchers wrote.

According to the research letter, published Monday in the journal JAMA Pediatrics, 4.9% of American adults living with someone 18 or under reported using e-cigarettes. That’s versus 4.2% of adults living in households without children according to study author Jenny L. Carwile, an epidemiologist at Maine Medical Center, who also pointed out that these adults tend to be older.

The authors say this could reflect “the relatively young age of e-cigarette users” and the perception that vaping is safer than smoking combustible cigarettes.

These rates changed from place to place, from 2.3% in the District of Columbia to 7.7% in Oklahoma.

The data came from a nationally representative phone survey in 2016 and 2017. However, the researchers could not determine how much adults tended to vape in kids’ presence or additional secondhand exposure from other people, such as siblings and peers.

Previous research has suggested that teens who live with someone who vapes are more likely to pick up the habit themselves.

The prevalence of vaping among adults isn’t very different from that of middle schoolers, which was 4.9% in 2018, according to a report by the US Centers for Disease Control and Prevention.

In comparison, 20.8% of high schoolers are current e-cig users, according to the CDC report. Vaping increased nearly 80% among high schoolers and 50% among middle schoolers from the year before.

Get CNN Health's weekly newsletter

Sign up here to get The Results Are In with Dr. Sanjay Gupta every Tuesday from the CNN Health team.

The authors of the new paper point out that, in addition to inhaling the aerosol secondhand, there’s a risk that certain chemicals in e-liquids, namely nicotine, can be absorbed through the skin or even ingested. Experts warn of this particular risk among young children.

Dr. Robert Jackler, founder of Stanford Research into the Impact of Tobacco Advertising, previously told CNN that some e-liquids with high nicotine concentrations represent “a huge poisoning risk.” Some bottles, many with sweet flavors, lack childproof caps and contain enough nicotine to kill an entire preschool class, he said.

With the rise in e-cig popularity has come a rise in calls to poison control centers, he added.