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 Exposure to e cigarette aerosol over two months induces accumulation of neurotoxic metals and alteration of essential metals in mouse brain ScienceDirect E Cigarettes and Vaping PPAC Central Vaping while pregnant could cause craniofacial birth defects, study shows Nicotine in e cigarette aerosol reduces GABA neuron migration via the 7 nicotinic acetylcholine receptor Scientific Reports