History of E-Cigarettes

My friend, Mike Reed, sent me this:

I was curious about the history of eCigs.  They were invented in China in 2003 and migrated to the US in 2006.  We've seen the videos; some of these vapers look like forest fires.  If there were some inherent danger it would probably have surfaced by now.

• https://cleansmokeusa.com/vaping-101/history-of-electronic-cigarettes/#
• http://guidetovaping.com/2011/09/history-of-electronic-cigarettes/
• https://www.ecigarettedirect.co.uk/ashtray-blog/2012/05/history-electronic-cigarette.html