Daily exposure to formaldehyde and acetaldehyde and potential health risk associated with use of high and low nicotine e liquid concentrations Scientific Reports Vape Residue May Harm Unborn Babies' Immune Systems Respiratory Therapy Northeast Here's a list of chemicals that can be found in a vape (and where else it is used or can be found): Acetaldehyde found in car exhaust The impact of e cigarette exposure on different organ systems: A review of recent evidence and future perspectives ScienceDirect