Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN 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 Is Secondhand Vaping Harmful To Your Health? Study suggests switching from smoking to vaping indoors may reduce children's secondhand exposure to nicotine