Senator David Leyonhjelm is acting like an errand boy in Parliament for "big tobacco", writes Simon Chapman in The Drum.

The misinformation in the tobacco control field is so widespread that hardly a day goes by that an anti-smoking advocate somewhere doesn't publicly declare that smoking may be no more dangerous than vaping. Yesterday, it was the Sedgwick County Health Department (Wichita, KS), which wrote in an op-ed in the Kansas City Star:

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