Couldn't help but notice your 3 sources are just conservative propaganda sites and not actual medical or scientific ones.
Prove they are conservative propaganda sites.
TORONTO — When Conrad Black founded the National Post in 1998, the explicit intent was to create a conservative newspaper. And by Canadian broadsheet standards, that’s certainly what the Post was.
Is the National Post still a conservative newspaper? - Winnipeg Free Press
The Economist is a bit more mixed depending on source. Looking at demographic info though it's more conservative than liberal in terms of readership.
Section 4: Demographics and Political Views of News Audiences | Pew Research Center for the People and the Press
[As an aside, looking at other demo tables on that link above, Fox News viewers only have 24% being college grads vs CNN's 29% and MSNBC's 26% supporting the arguement Fox News is for stupid people.

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CTV.ca is defined as liberal by Canadian sources. But it's worth mentioning Canadian, US, and UK ideas of liberal/conservative don't always match up so,
" In Britain and Europe "liberal" and "conservative" political parties fused, disappeared or became indistinguishable, and in politics the traditional conservative-liberal dichotomy was replaced by a conservative-socialist (Marxist, or social-democratic/labour) dichotomy. In the United States classical liberalism became political orthodxoy for both parties, and any "right-left" opposition was based on such questions as race relations and military policy. In Canada the Liberal Party was until well into the twentieth century "liberal" in the traditional sense, being, for example, the party of continental free trade, whereas the Conservative Party represented old "Tory" values: allegiance to the British Empire and protectionism.
In the Pearson-Trudeau era the Liberal Party became Keynesian, as did the Conservative Party; in the late 1980's both parties reverted to a classical liberal conception of the minimalist, laissez-faire state."
Liberalism
While ctv.ca is liberal, it's almost a meaningless distinction now.