CDC has analyzed national data on use of THC-containing product brands by EVALI patients. (EVALI refers to national outbreak of e-cigarette or vaping product use associated lung injury).
CDC recommends that people should not use THC-containing
e-cigarette, or vaping, products, particularly from informal sources like
friends, family, or in-person or online dealers. In addition, people should not
add any substances to e-cigarette or vaping products that are not intended by
the manufacturer, including products purchased through retail establishments.
THC-containing products continue to be the most commonly
reported e-cigarettes, or vaping, products used by EVALI patients, and it
appears that vitamin E acetate is associated with EVALI. However, many
substances and product sources are being investigated, and there might be more
than one cause. Therefore, while the investigation continues, persons should
consider refraining from the use of all e-cigarette, or vaping, products.
CDC will continue to update guidance, as appropriate, as new
data become available from this complex outbreak.
NOTE: As we go to publication, the state of Massachusetts has announced that 6 confirmed cases of vaping illnesses have come from licensed marijuana facilities.