Lung cancer risks persist with e cigarette use after quitting tobacco smoking Scientific review finds e cigarettes likely cause lung and oral cancer A new study has found that when the main ingredient in most e cigarette fluids is heated, it forms two toxic chemicals capable of harming human lung cells. The research, published in Frontiers Vaping Lung Damage Resembles Chemical Burns OPB Health Effects of Vaping Smoking or vaping may put people into higher risk of COVID 19 WWLP