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 How Electronic Cigarettes Work HowStuffWorks Electronic cigarette exposure on insulin sensitivity of ApoE gene knockout mice Smoking vs. Vaping Prevent Substance Misuse The Truths Behind Vaping: Information for Youth and Teens USU E Cigarettes and the Rising Health Risks Rau's IAS