Health officials investigating a nationwide outbreak of vaping illnesses have listed, for the first time, the vape brands most commonly linked to hospitalizations.

Most of the nearly 2,300 people who suffered lung damage had vaped liquids that contain THC, the high-inducing part of marijuana.

Dank Vapes was the brand used by 56% of the hospitalized patients nationwide.

Dank is not a licensed product coming from one business, it is empty packaging that can be ordered from Chinese internet sites. Illicit vaping cartridge makers can buy the empty packages and then fill them with whatever they choose.

Other product names at the top of the list from CDC were TKO (15%), Smart Cart (13%) and Rove (12%).