My wife vaps now, to which I am eternally grateful. When she filled up the bedroom with cigarette smoke, it made sleeping damn near impossible; I have literally gathered up my pillow and a blanket and gone downstairs to sleep on a uncomfortable couch (which is a form of torture in-and-of itself). I was an environmental engineer for over 30 years and read a lot toxicological studies and research during that time -- thus leading me to conclude that "environmental science" is an oxymoron. Did you know that "one-in-a-million risk" is not a statistical term at all, but is a definition: 'if you assume a safety factor of 10 for unaccounted errors in the rat study, then assume another factor of 10 for extrapolating the rat study to humans, then throw in another factor of 10 for the variability for human sensitivities, then throw in another factor of 10 for children, then assume another factor of 10 because humans live 80 years to a rats 2, then throw in another safety...' No lie, "one-in-a-million risk" was chosen, not because it was protective of human health, but because it "sounded cool." I spent a lot of time and (the company's) money modeling to show that emission "X" did not pose a greater than one-in-a-million risk at the property boundary. But what the hell, it gave me a good living. Having said that, I will say that I learned a thing or two working in the field. Now I'm not given into the "dioxin is the most hazardous substance know to man" hyperbole, but I strongly suspect that when you add THC oil (or any oil) to your vap juice, the combustor is going to generate some dioxins and furans, along with other nasties, when it burns the oil. It isn't any wonder to me that some people are more sensitive to these chemicals than the average person.