Is "approved for human inhalation" a thing? Don't regular cigarettes have tar that people inhale?
Theatrical fog causes "irritation of mucous membranes such as the eyes and the respiratory tract associated with extended peak exposure to theatrical fog. " Another study "also found long-term exposure to smoke and fog was associated with both short-term and long-term respiratory problems such as chest tightness and wheezing".
Cigarettes are terrible, but vaping ain't vitamins.
https://en.wikipedia.org/wiki/Fog_machine#Adverse_health_eff...
Not all theatrical fog is the same as vaping as far as I am aware. If you have any articles specifically dealing with the components used for vaping I would be interested to read them. Vaping does not use oil.