Cigarettes or vapes, pick your poison Fred Hutch 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 Vaping makes lung bacteria more harmful and cause more inflammation The combination of propylene glycol and vegetable glycerin e cigarette aerosols induces airway inflammation and mucus hyperconcentration Scientific Reports