No individual vapers will be targeted, Mitch Zeller, director of the FDA's Center for Tobacco Products. "The focus of [the FDA investigators'] work is to identify what is making people sick, as well as a focus on the supply chain".
A congressional subcommittee will hold a hearing on the outbreaks on Tuesday. A bipartisan group in Congress is working with parents to keep teenagers away from e-cigarettes, while accusing the vaping industry of marketing to kids. Governors are calling for prohibitions on flavors like bubble gum, cotton candy and banana split, which critics say are meant to entice young people into trying vaping.
"We're facing a true epidemic in this country", DeGette said in a statement.
The president of the Canadian Medical Association recently said youth vaping has become a public health crisis.
The outbreak has affected users of both nicotine-containing products and those containing THC. Some have reported the use of e-cigarette products containing only nicotine.
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The CDC has recommended that smokers stop using e-cigarette products while an investigation is underway.
Meanwhile, several TV networks - including CBS, WarnerMedia and CNN - say they will no longer air ads for e-cigarettes.
The FDA, whose Office of Criminal Investigations is now involved in the inquiry, is running tests to determine with what substances the nicotine or THC was cut, as well as whether any additional diluents, additives, pesticides, poison or toxins were used.
The CDC suspects "chemical exposure". No one substance has surfaced in all samples. Investigators are looking into the possibility that people are getting contaminated products, or even counterfeit products, because many victims report having bought marijuana on the street rather than from a store, the Post said. Missouri health officials on Thursday announced an eighth person had died. Seven deaths have been confirmed in 6 states.
Schuchat said three-quarters of the cases are male, and two-thirds are between the ages of 18 and 34, while 16% are under the age of 18.