Figure 2.
The prevalence of ever and current e-cigarette use and current tobacco smoking at age 19 years in relation to number of smoking family members at age 14–15 years. E-cigarette, electronic cigarette.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.