At that time, a patient in Illinois with a medical history of using e-cigarettes died after suffering from a severe lung disease.
The CDC update stated: "Vitamin E acetate is closely related to the EVALI outbreak and should not be added to any e-cigarette or e-cigarette products. However, the evidence is insufficient to exclude the contribution of other chemicals of concern, including THC or non-THC. Chemical substances in products (in some cases)."
Soon, the CDC team was deployed to the Midwestern states. It found that some patients started showing symptoms in April.