Secondhand Vape Exposure: Effects, Who's at Risk, and More The health risks of secondhand smoke are widely understood. But what about secondhand vaping? 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 First, Second and Thirdhand Smoke: The Differences and Dangers Tobacco Stops With Me What Chemicals Are Present in Secondhand Vape Emissions?