Basically all these vaping-related hospitalizations are directly linked to black-market or knockoff THC oil. The shady stuff & untested devices are what make people sick: banning flavored e-cigs is gonna get ppl back on cigarettes & make the black-market problem way worse
Personally I started making my own juice with just VG and nicotine since flavored juices almost invariably make me break out - it's not inconceivable that a few people might have stronger reactions, though I'm actually surprised at how uncommon it seems to be