How safe is vaping? UCLA Is vaping as bad as smoking cigarettes? BBC Learning English from the News Vaping Lung Illness: Why E Cigarettes' Dangers Might Get Worse The Atlantic Vaping just once raises oxidative stress levels in nonsmokers, increasing disease risk UCLA E cigarette Myths Go Up In Smoke St. George Medical Clinic Smokers and Vapers May Be at Greater Risk for Covid 19 The New York Times