Effect of unguided e cigarette provision on uptake, use, and smoking cessation among adults who smoke in the USA: a naturalistic, randomised, controlled clinical trial eClinicalMedicine New research: Second hand vaping is NOT harmless A recent study published on PubMed is raising serious concerns about the health effects of second hand exposure to e cigarettes. People exposed to second hand An updated overview of e cigarette impact on human health Respiratory Research Springer Nature Link E Cigarettes: Perspectives, Regulation and Health Effects Nova Science Publishers