Harvard scientist finds microbial contaminants in e cigs Harvard Gazette Pro inflammatory effects of e cigarette vapour condensate on human alveolar macrophages Thorax E Cigarette and Endothelial FunctionA Critical Review of Preclinical Studies Chemical Research in Toxicology New medical research is raising concerns about possible links between vaping and bronchiolitis obliterans also known as popcorn lung, a rare and irreversible lung disease. Health experts say more long term Electronic cigarettes cause much less inflammation than tobacco Prevention Observatory of the Montreal Heart Institute