The paper defends its ethical standards by arguing that it "was consistent with Facebook's Data Use Policy, to which all users agree prior to creating an account on Facebook, constituting informed consent for this research."

• The truth is that there is abundant evidence that electronic cigarettes are much safer than regular cigarettes. Even the tobacco industry itself acknowledges that smoking is more hazardous than vaping.

By opposing the classification of e-cigarettes as tobacco products, the e-cigarette associations have been everything they can to avoid regulations that treat these products in the same way. The reason is simple: such regulations would give cigarettes a huge competitive advantage in the market place. Laws that categorize e-cigarettes the same way as tobacco products are essentially protective legislation for tobacco cigarettes. By fighting such a classification, e-cigarette associations are doing what they can to reject the idea of this protective legislation so that they can gain the upper hand on cigarettes and eventually, make these products obsolete.

This conclusion - that thirdhand smoke is deadly - was disseminated widely throughout the world. Headlines read like this:

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