NEJM reported on Vaping induced lung injury which is mostly lipoid pneumonia. While it is mostly related to THC containing products, even nicotine products like Juul have glycerol which can cause lipoid pneumonia, a potentially fatal condition. CDC has advised refraining from any vaping products.
Meanwhile, Altria (NYSE: MO) who bought Juul at a heavy premium has seen its stock decline in the past few months. If significant health concerns arise and the CDC/FDA ban all vaping products, it could be a big revenue shock for Altria (no position).