Study suggests switching from smoking to vaping indoors may reduce children's secondhand exposure to nicotine 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. Secondhand vaping may pose risk to your kids: New study In secondhand vape, scientists smell risk American Heart Association Secondhand vape exposure: Risks and side effects