While vaping is not risk free, it is less harmful than tobacco Our World in Data Scientists Warn Against Breathing in Secondhand Vape 'Smoke' Newsweek 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 Avoiding Tobacco Smoke and E Cigarette Aerosol Is a Key Part of Asthma Management Asthma and Allergy Foundation of America In secondhand vape, scientists smell risk American Heart Association