Hidden Dangers of Secondhand Vaping Emory Health Digest Secondhand smoke is harmful. Children exposed to secondhand smoke are at a 50 to 100% higher risk of acute respiratory illness. Say NO TOBACCO! Clark Sleeping baby safety tip: Keep baby's environment smoke and vape free. Secondhand smoke in areas where a baby sleeps or spends time, like home or the car, increases the risk of 10 Strategies Big Tobacco and E Cigarette Companies Use to Target Kids American Lung Association Does Vaping Cause Secondhand Smoke?