> The majority have vaped THC, the psychoactive ingredient in marijuana, but some say they have vaped only nicotine. > Another patient was a 21-year-old man wh

> The majority have vaped THC, the psychoactive ingredient in marijuana, but some say they have vaped only nicotine. > Another patient was a 21-year-old man who reported vaping nicotine for five years, and who became ill shortly after adding marijuana to it for the first time. This is getting ridiculous, journalists need to get more precises when discussing "vaping".