E Cigs and Second Hand Vaping: Dangers and Protections Dangers Of Second Hand Vapes Can Disposable Vapes Cause Secondhand Vapor Second Hand Vape Smoke Dangers 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 smoke and secondhand aerosol