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. 2021 Nov 16;24:101644. doi: 10.1016/j.pmedr.2021.101644

Fig. 2.

Fig. 2

Timeline of cloud chasing-relevant events: 2011–2021. Note. The estimate of timeframe for the first cloud chasing competitions come from Raychaudhuri (2016). Information on advent of second and third generation of ENDS supported by Williams and Talbot (2019). Data on cloud chasing on social media supported by Trippers (2014) and google data retrieved from google trends (Google, n.d.). Data on competitions at vape conventions is from Williams (2015). Data on searches for cloud chasing reaching record lows found using google trends data (Google, n.d.). Data on JUUL sales from Herzog and Kanada (2018) and youth use of JUUL from Vallone et al. (2019). The date for JUUL’s removal of U.S. advertisements retrieved from Graham (2019). Information on EVALI came from Centers for Disease Control and Prevention [CDC], 2020, Leas et al., 2021 and estimates of vape influencers’ decreased engagement on social media from Trippers, 2014, Trippers, 2017.