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 Smoke signals in the DNA of normal lung cells An updated overview of e cigarette impact on human health Respiratory Research Springer Nature Link Toxic metal, leached from e cigarette coil, permanently scars woman's lung E cigarette induced changes in cell stress and mitochondrial function ScienceDirect