While vaping is not risk free, it is less harmful than tobacco Our World in Data Thirdhand Smoke 101 Thirdhand Smoke Resource Center 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 study shows secondhand vaping emissions are less toxic than cigarette smoke