Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN 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 Scientists Warn Against Breathing in Secondhand Vape 'Smoke' Newsweek Evidence Mounts About the Health Impact of Second Hand Vaping Bisnar Chase