Juul study shows secondhand vaping emissions are less toxic than cigarette smoke 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 Secondhand Vape Plumes Could Form Lung damaging Radicals Thirdhand Smoke Resource Center Protecting Californians E Cigarettes (Vapes) Smoking and Tobacco Use CDC