E cigarettes potentially harmful: PET imaging shows greater lung inflammation in e cigarette users than cigarette smokers EurekAlert! Vaping propylene glycol and vegetable glycerine may lead to lung inflammation Cigarettes or vapes, pick your poison Fred Hutch ICYMI: How e cigarettes can break your heart Physicians for a Smoke Free Canada Vaping makes lung bacteria more harmful and cause more inflammation How does e cigarette vapor alter the gut microbiome, body weight, and systemic inflammation levels?