Secondhand Smoke Second hand E cigarette Vapour Increases Risk Of Poor Respiratory Health Study Finds Cigarette Smoke Detector Student Assistance Program Hartford Memorial Middle School The Dangers of Vaping and Second Hand Smoke to Children Secondhand smoke and secondhand aerosol Secondhand smoke is harmful. Children exposed to secondhand smoke are at a 50 to 100% higher risk of acute respiratory illness. Say NO TOBACCO! Children at risk: Emory study uncovers the hidden dangers of secondhand vape exposure