Who should get a fourth COVID-19 vaccine dose — and when? - Toronto Star

New Omicron variants, combined with waning immunity for many Canadians, lead to a tricky debate, as Health Canada looks out for “concerning trends.”

With a fourth dose of vaccine only available across the province to those deemed at higher risk for severe COVID-19 outcomes, some infectious disease experts are calling for expanded eligibility due … [+5973 chars]

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