Illustration of the four generations of e cigarette or vaping products. Download Scientific Diagram How have e cigarettes changed over time? Vape and Wheeze: E cigarette Users Develop Respiratory Symptoms Respiratory Therapy An Overview of E Cigarette Impact on Reproductive Health 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 To Vape or Not to Vape: The Truth About E cigarettes Lions Talk Science