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The birds are back in town. Spring migration could fuel spread, evolution of avian flu, scientists warn

7 Apr 2023
Canada
Across Canada, an estimated seven million birds and counting have been infected with highly pathogenic avian influenza during a devastating global outbreak that shows no signs of winding down. Now, as millions more migrate north, scientists warn it’s yet another opportunity for this virus to spread and evolve.
CBC / Lars Flora
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