MedicalResearch.com Interview with:Jenny L. Carwile, ScD, MPH Department of Medicine Maine Medical Center Portland   MedicalResearch.com: What is the background for this study? What are the main findings? Response:  Although e-cigarette aerosols are commonly perceived to be "harmless water vapors" they contain numerous potentially harmful chemicals including volatile organic compounds like formaldehyde, nicotine, heavy metals, and ultrafine particulates. Non-users can be exposed to these chemicals through secondhand exposure. We found that in the US 4.9% of adults who lived in a household with children were current e-cigarette users. (more…)