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 Does Vaping Cause Second Hand Smoke V2 Cigs UK E Cigs and Second Hand Vaping: Dangers and Protections Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN Is Second Hand Vape Smoke Dangerous? RxLeaf