The US Food and Drug Administration is going after vaping company Eonsmoke LLC with a warning letter seeking to remove roughly 100 flavored vaping products from the market, saying the company “has ignored the law by marketing dozens of unauthorized e-cigarette products,” according to a statement by Acting FDA Commissioner Dr. Ned Sharpless.

Thew news comes as the number of health cases linked to vaping continues to grow.

“Companies are on notice — the FDA will not allow the proliferation of illegally marketed e-cigarettes or other tobacco products, to come at the expense of our children,” Sharpless said in a statement Thursday. “Today’s action makes clear that we will continue to keep a close watch on companies and take swift steps when violations are found.”

The warning letter also cites claims made by the company that its products are less harmful than other marketed tobacco products — claims that require FDA review. The company has also advertised online and through social media, including posts “by well-known influencers,” that do not contain the required warning statement that nicotine “is an addictive chemical.” The company was requested to, but did not provide, the FDA with a list of ingredients in its products.

Eonsmoke LLC sells e-liquids in flavors “such as mango, cotton candy, sour gummy worm and others that are so popular with kids,” Sharpless said.

CNN has reached out to Eonsmoke for a response.

More than 1,600 cases

As of Tuesday, there were 1,604 lung injury cases associated with e-cigarette products in 49 states, the District of Columbia and the US Virgin Islands, according to the US Centers for Disease Control and Prevention. Alaska is the only state without a reported case.

That’s an increase from last week, when there were 1,479 cases of vaping-related lung injuries.

The CDC on Thursday also identified 34 vaping-related deaths in 24 states: three each from California, Indiana and Minnesota; two each from Georgia, Illinois, Kansas and Oregon; and one each from Alabama, Connecticut, Delaware, Florida, Massachusetts, Michigan, Mississippi, Missouri, Montana, Nebraska, New Jersey, New York, Pennsylvania, Tennessee, Texas, Utah and Virginia.

The patients who died ranged in age from 17 to 75.

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Several agencies, including the CDC, FDA, state and local health departments, and other clinical and public health partners, are continuing to investigate the multistage outbreak. The specific chemical exposure causing these lung injuries remains unknown.

The CDC has reported that all patients in the outbreak had a history of using e-cigarette products, and most have reported a history of using products containing tetrahydrocannabinol or THC, the primary psychoactive component of cannabis.

FDA nears compliance policy

A written response from the company was requested within 15 working days. If the company doesn’t comply, the FDA can then take further action such as civil money penalties, seizures or injunctions.

The FDA had sent Eonsmoke a letter a year ago asking for more information about whether the company was illegally marketing new tobacco products. The company has also previously been named in probes such as an investigation by Massachusetts Attorney General Maura Healey and a lawsuit by North Carolina Attorney General Josh Stein.

The FDA’s latest move comes amid calls by lawmakers such as Rep. Raja Krishnamoorthi and Sen. Dick Durbin for the FDA to issue the compliance policy it announced last month that would clear the market of unauthorized flavored e-cigarettes.

In an email Tuesday, an FDA spokesman said the agency intends to finalize its compliance policy “in the coming weeks” and that the FDA “plans to share more on the specific details of the plan and its implementation soon.”‎

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