What Are the Risks from Secondhand Vape Smoke? NVB Inc. About one in four adults in California report being exposed to secondhand smoke or vape in the past two weeksoften on sidewalks, at home, and in recreational spaces like parks and beaches. Does cannabis create thirdhand smoke? Thirdhand Smoke Resource Center Chemicals In secondhand vape, scientists smell risk American Heart Association 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