Secondhand Smoke Social Media Message Library Tobacco Education Clearinghouse of California According to a Centers for Disease Control and Prevention (CDC) study, 40% of U.S. adults believe that children's exposure to secondhand aerosol from e cigarettes causes only some or little harm, and 5% First hand smoke comes from all combustible tobacco products. This includes Cigarettes, Cigars, Pipes, Hookah, and VAPES. This is the primary source of nicotine addiction. No amount of Second hand smoke is safe and More bad news about vaping: Teens increasingly are breathing in secondhand e cigarette vapors, report says Chicago Tribune