E cigarette and Vaping Associated Lung Injury (EVALI) EMOttawa Blog What are the respiratory effects of e cigarettes? The BMJ E Cigarette User Has Rare Form of Lung Scarring Typically Found in Metal Workers Health experts warn that flavored e cigarettes may lead to permanent lung damage. A U.S. teenager was diagnosed with "popcorn lung" after covertly vaping for three years, resulting in a lifelong, debilitating condition.