Data communicated by Wells Fargo and Yelp had already identified a strong rise of vaping in the US. The number of specialized vaping stores increased from 3.500 in 2014 to 10.591 in 2016 and during the same period, the vaping industry turnover went from 1.7 to 4.1 billion dollars. However, those quantitative data did not help understand how, when and why people started vaping.
The vaping trend, if we believe Twitter, went directly from New York to the West Cost, before moving down to the South and going back to the North East of the US. Finally, the heart of the country was reached last.