Parents using e cigs expose kids to dangerous secondhand vapor Futurity Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN What Are the Risks from Secondhand Vape Smoke? NVB Inc. Secondhand Smoke vs Vape: What the Science Says Study finds secondhand smoke may be source of lead exposure in children, adolescents Vital Record