Authorities in the United States (US) have cautioned against the use of e-cigarettes in young people, pregnant women or adults who do not currently use tobacco products, as they continue their investigations into a mystery lung disease which has affected hundreds of people who use e-cigarettes.
Last month, authorities including the Centers for Disease Control and Prevention (CDC) and the US Food and Drug Administration (FDA) announced they were investigating the cause of a severe pulmonary disease identified in people who use e-cigarettes. Many of the patients reported recent use of tetrahydrocannabinol (THC)-containing products, some reported using both THC- and nicotine-containing products and a smaller group reported using nicotine only. On Friday, the CDC said it was investigating 450 potential cases.
It said that based on the clinical and laboratory evidence to date, it believes that a chemical exposure is likely associated with these illnesses, and said further investigations would determine which specific products or substances are involved. While no specific e-cigarette device or substance has been linked with all cases, some laboratories have identified vitamin E acetate in product samples.
While the investigation is ongoing, the CDC said people should consider not using e-cigarette products.