A Review of Toxicity Mechanism Studies of Electronic Cigarettes on Respiratory System Another Gross Reason to Put Down the E Cigarettes American Lung Association Knowledge, perceptions, and experiences of e cigarettes among young adults in Cape Town, South Africa: Insights from focus groups to inform regulations and prevention strategies New study comes the closest yet to proving that e cigarettes aren't as dangerous as smoking PDF) The New Danger of Thirdhand Smoke: Why Passive Smoking Does Not Stop at Secondhand Smoke