Millions of people are exposed to secondhand smoke every day. People living in multi unit housing are some of the most exposed. The only way to fully protect people from secondhand smoke at Secondhand Electronic Cigarette Aerosol and Indoor Air Quality US EPA Secondhand Exposure to E Cigarettes Puts COPD Patients At Risk Respiratory Therapy Second hand e cigarette vapour increases risk of poor respiratory health, study finds Nursing in Practice Scientists Warn Against Breathing in Secondhand Vape 'Smoke' Newsweek Ever wonder if VAPING has any secondhand smoke? Check out our myths and truth post to learn more. TLDR: Be courteous. Just because vape aerosol doesn't smell as bad as cigarette smoke,