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More Canadians need 4th shot before fall as COVID-19 evolves: expert

1 month ago

2:41

More Canadians need 4th shot before fall as COVID-19 evolves: expert

1 month ago
News
Duration 2:41

Toronto respirologist Dr. Samir Gupta expressed concern over the erosion of protection against severe COVID-19 as the virus evolves, suggesting more Canadians need a fourth shot before the fall.

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