How to Smoke a Vape Properly HV Vaping: How E cigs Work (Infographic) Live Science E cigarette flavors are toxic to white blood cells, warn scientists 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 Vaping Safety, Smoking, Dangers, Pros, Cons, Debate, E cigarettes, & Tobacco Britannica