4th COVID-19 vaccine dose: What’s the science behind another booster?

January 9, 2022

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By Saba Aziz Global News

Posted January 9, 2022 3:09 pm

2:10Ontario long-term care residents now eligible for 4th doses of COVID-19 vaccine

WATCH: Ontario long-term care residents now eligible for 4th doses of COVID-19 vaccine – Dec 30, 2021