Scientists Warn Against Breathing in Secondhand Vape 'Smoke' Newsweek Many people assume vaping is harmless to bystanders, but secondhand aerosol can contain ultrafine particles and chemical residues. Researchers are examining how exposure may affect airways and overall health, especially for children Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN Secondhand vaping: The latest vaping health risk CNET