Vaping exposes user to harmful levels of particulate matter, study suggests CUNY Graduate School of Public Health & Health Policy Avoiding Tobacco Smoke and E Cigarette Aerosol Is a Key Part of Asthma Management Asthma and Allergy Foundation of America Some reports state that these new, flavored smoking devices are less harmful than tobacco cigarettes but how safe is vaping? In this third part of a four part series, China Daily examines the New study comes the closest yet to proving that e cigarettes aren't as dangerous as smoking