Ever-users of e-cigarettes were asked on how many of the past 30 days they had used an e-liquid with nicotine, an e-liquid without nicotine, and an e-liquid they “did not know what it contained”, respectively. In 2020, most (84.4%a) said they had used an e-liquid with nicotine on at least one day, while just 21.1%b said they had used an e-liquid without nicotine on at least one day, and one in ten (10.1%c) said they had used an e-liquid they “did not know what it contained” on at least one day.
The percentage of past 30-day vapers who reported using an e-liquid with nicotine on at least one day in the past 30 was similar to the 2019 estimate of 84.1%d.135
Prevalence of using a nicotine-containing e-liquid in the past 30 days did not vary significantly by smoking status136 (Figure 11.30); among past 30-day e-cigarette users, most current smokers (82.1%e), former smokers (88.4%), and never smokers (82.8%) had used e-cigarettes containing nicotine in the past 30 days.
