E-cigarette use is prevalent among U.S. adults, especially among men; lesbian, gay, bisexual, and transgender persons (LGBT); those who are unemployed; and those with chronic disease. E-cigarette use was also more common among those living in the South and West. [...] Researchers [...] used the largest and most extensive dynamic health survey—the 2016 Behavioral Risk Factor Surveillance System (BRFSS) national survey—to determine the most up-to-date national and state-level prevalence of current e-cigarette use among U.S. adults.