E-cigarettes in their current form were invented in 2004 by a Chinese pharmacist Hon Lik who lost his father to smoking. Since then over 60 million (6 crore) smokers have made the switch. E-cigarettes produce vapour instead of smoke, hence their use is called vaping. Though not entirely risk-free, they are over 95% less harmful than smoking since they eliminate combustion, which produces smoke and tar which contain over 7,000 chemicals.

For smokers unable to quit by other means, or for those who do not wish to quit the use of nicotine but want to consume it in less harmful ways, vaping provides a viable harm reduction alternative. Unlike analog cigarettes, vaping allows users to gradually reduce their nicotine intake and gradually quit its use if they so wish. Vaping is not intended for nosmokers and underage as it contains nicotine, which is addictive.