Why Canada's big bets on delaying, mixing doses of COVID-19 vaccines could pay off

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https://i.cbc.ca/1.5943536.1617750063!/cumulusImage/httpImage/image.jpg_gen/derivatives/16x9_460/covid-19-vaccination.jpg Canada's approach of delaying and even mixing different COVID-19 vaccine doses may seem unorthodox on the surface, but multiple experts say they're rooted in decades of science, backed up by emerging research, and could be preventing deaths.


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