Health Problems Caused by Secondhand Smoke Smoking and Tobacco Use CDC Kids Health Info : Vaping and e cigarettes Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN Secondhand Vape Exposure: Effects, Who's at Risk, and More Vaping Cannabis Produces Stronger Effects Than Smoking Cannabis For Infrequent Users Johns Hopkins Medicine