E-cigarettes are sometimes called e-cigs, vapes, and electronic nicotine delivery systems (ENDS). When people use them, this is often called vaping. Some e-cigarettes look like other tobacco products like lit cigarettes, cigars, or pipes, while others can look like everyday household items such as USB computer memory sticks, writing pens, asthma inhalers, mint tins, and clothing
Unlike e-cigarettes, which use e-liquid, heated tobacco products warm tobacco leaves
Smoking in public places was banned, while chewing and sniffing was not
This distinction mattered for their analysis, Wang noted
Read more: 3 Part Series on e-cigarettes From 2019: Vaping Crisis