The Centers for Disease Control and Prevention tallied six deaths and more than 450 possible cases of severe lung injury in 33 states and one jurisdiction.
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The CDC confirmed that investigators narrowed their focus and that the additive vitamin E acetate is a chemical involved in many of the cases, but officials emphasized it is not in all of the cases being reviewed.
Vitamin E acetate is a "sticky greasy oil" that some marijuana includes, said Devin Alvarez, CEO and founder of Straight Hemp CBD products. "Not all oils are the same. Thick and greasy seem to be the culprits."
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