Explained: What are e cigarettes? Why did the govt ban them? India Today E Cigarettes in India: Why They're Harmful as Lok Sabha Row Erupts Times Now How E Cigarettes Work E cigarette products sold on the market quadruple in just one year Incredible Vaping has now been officially linked to a rare and permanent lung disease. Doctors and researchers say the chemicals in e cigarette vapor can damage the tiny airways in your lungs.