Frontiers Chronic E Cigarette Aerosol Inhalation Alters the Immune State of the Lungs and Increases ACE2 Expression, Raising Concern for Altered Response and Susceptibility to SARS CoV 2 Frontiers Aerosolized nicotine from e cigarettes alters gene expression, increases lung protein permeability, and impairs viral clearance in murine influenza infection Electronic Cigarette Aerosol Modulates the Oral Microbiome and Increases Risk of Infection: iScience Pyrazine Additives E Cigarette Forum