human
I've heard about a new type of e-cigarette. What are these and are they safe?
assistant
These devices are called electronic nicotine delivery systems, or ENDS for short. They use an atomizer to vaporize liquid nicotine, which is then inhaled by the user. The main difference between traditional cigarettes and these products is that they do not contain any tobacco, so they don't produce smoke or ash. Instead, users inhale aerosolized nicotine, which can be less harmful than cigarette smoke.