Booster shots, 3rd doses and who needs them
Almost 11 months after the first Canadians got their COVID-19 vaccinations, many people have questions about how their immunity defence is holding up. Here's what we know and what we don't.
Almost 11 months after the first Canadians got their COVID-19 vaccinations, many people have questions about how their immunity defence is holding up. Here's what we know and what we don't.
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