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Waning immunity sparks debate about need for COVID-19 booster shots

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CBC News: The National

3 years ago

Waning immunity sparks debate about need for COVID-19 booster shots

Waning immunity sparks debate about need for COVID-19 booster shots

Waning immunity sparks debate about need for COVID-19 booster shots
2:03
Waning immunity sparks debate about need for COVID-19 booster shots
by CBC News: The National
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