E Cigarettes (Vapes) Smoking and Tobacco Use CDC Secondhand Electronic Cigarette Aerosol and Indoor Air Quality US EPA From flavor bans to secondhand aerosol exposure, there's a lot people don't realize about how vaping impacts health, policy, and safety. Flavor restrictions can change tobacco use patterns, influence black market Secondhand Vape Exposure May Be Risky for Asthmatic Teens UCT Lung Institute