E-cigarettes are battery-powered devices providing nicotine and other additives to their users in aerosol form. Vapor is another term for aerosol. Currently, there are many types of these devices used in the US. E-cigs, hookah, vape pens, and e-cigars to name a few.
Nicotine is extremely addictive, and causes health risks, especially for young people. Nicotine can be harmful to a developing fetus. Evidence also suggests nicotine exposure during adolescence may have adverse affects on the developing brain.