Do electronic cigarettes create thirdhand chemical residue? Thirdhand Smoke Resource Center E Cig Vapor Or Secondhand Smoke: Which Is Worse For You? Despite widespread smoke free policies in California, rates of recent exposure to secondhand tobacco smoke, vape aerosol, and cannabis smoke among adults aged 1864 have been slowly increasing since 2020, with vape exposure Scientists Warn Against Breathing in Secondhand Vape 'Smoke' Newsweek