RT Journal Article SR Electronic T1 Vaping versus JUULing: how the extraordinary growth and marketing of JUUL transformed the US retail e-cigarette market JF Tobacco Control JO Tob Control FD BMJ Publishing Group Ltd SP 146 OP 151 DO 10.1136/tobaccocontrol-2018-054382 VO 28 IS 2 A1 Huang, Jidong A1 Duan, Zongshuan A1 Kwok, Julian A1 Binns, Steven A1 Vera, Lisa E A1 Kim, Yoonsang A1 Szczypka, Glen A1 Emery, Sherry L YR 2019 UL http://tobaccocontrol.bmj.com/content/28/2/146.abstract AB Background While national surveys showed declines in e-cigarette use in the USA between 2015 and 2016, recent reports indicate that JUUL, a sleekly designed e-cigarette that looks like a USB drive, is increasingly being used by youth and young adults. However, the extent of JUUL’s growth and its marketing strategy have not been systematically examined.Methods A variety of data sources were used to examine JUUL retail sales in the USA and its marketing and promotion. Retail store scanner data were used to capture the retail sales of JUUL and other major e-cigarette brands for the period 2011–2017. A list of JUUL-related keywords was used to identify JUUL-related tweets on Twitter; to identify JUUL-related posts, hashtags and accounts on Instagram and to identify JUUL-related videos on YouTube.Results In the short 3-year period 2015–2017, JUUL has transformed from a little-known brand with minimum sales into the largest retail e-cigarette brand in the USA, lifting sales of the entire e-cigarette category. Its US$150 million retail sales in the last quarter of 2017 accounted for about 40% of e-cigarette retail market share. While marketing expenditures for JUUL were moderate, the sales growth of JUUL was accompanied by a variety of innovative, engaging and wide-reaching campaigns on Twitter, Instagram and YouTube, conducted by JUUL and its affiliated marketers.Conclusions The discrepancies between e-cigarette sales data and the prevalence of e-cigarette use from surveys highlight the challenges in tracking and understanding the use of new and emerging tobacco products. In a rapidly changing media environment, where successful and influential marketing campaigns can be conducted on social media at little cost, marketing expenditures alone may not fully capture the influence, reach and engagement of tobacco marketing.