All Secondhand Smoke Is Dangerous There is no safe level of secondhand smoke. Breathing smoke from cigarettes, cigars, or vaping products can cause serious health problemsespecially for children, older adults, What harm does second hand fumes from vaping cause to young lungs? Medical experts want to know ABC11 Raleigh Durham 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 Juul e cigarettes win FDA authorization, sources say