Some Canadian doctors and public health experts say Canada should hit pause on this week's legalization of cannabis oils, given the nearly 1,300 cases of vaping-related lung injury in the U.S. due to an unknown cause.

Cannabis vapes are among a series of new products — including edibles, extracts and topicals, like lotions — that officially become regulated on Oct. 17, 2019. [...]
While doctors welcome the idea that the tetrahydrocannabinol, or THC, content in legalized products will be regulated, they are concerned about the health effects of vaping, which have yet to be well-researched and tested.