The Hidden Dangers of Secondhand Cannabis Smoke for Children Medical Health Associates of Western New York Secondhand smoke and vape can trigger your child's asthma attacks. Smoking and vaping are unhealthy for everyone but especially harmful for people with asthma. Whether at home, in the car, or Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN Secondhand smoke may be a substantial contributor to lead levels found in children and adolescents, new study finds