Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN Health Problems Caused by Secondhand Smoke Smoking and Tobacco Use CDC 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 Exposure: Effects, Who's at Risk, and More What is secondhand smoke: All about secondhand smoke that you should know