What you should know about bivalent COVID-19 boosters, including the difference between Moderna and Pfizer – CTV

Oct. 31, 2022

Canadians are being urged by the country’s federal, provincial and territorial governments to get one of two approved bivalent COVID-19 vaccines as soon as they’re eligible.

Because vaccine-conferred immunity wanes over time, boosters are important for keeping the population protected against COVID-19, health officials say, especially as the cooler weather threatens to bring another surge of cases.

The new shots – one by Moderna and one by Pfizer – were approved by Health Canada on Sept. 4 and Oct. 7, and provide broader protection against COVID-19 and its variants than previous versions of COVID-19 vaccines, the federal government says.

Bivalent vaccines target two different viruses or two strains of the same virus. In this case, the updated Pfizer-BioNTech Comirnaty vaccine targets the original SARS-CoV-2 virus as well as the Omicron BA.4 and BA.5 subvariants, which were known to be resistant to previous versions of the vaccines. Meanwhile, the updated Moderna Spikevax vaccine targets the original strain of the COVID-19 virus as well as the Omicron BA.1 subvariant.

Read more: https://www.ctvnews.ca/health/what-you-should-know-about-bivalent-covid-19-boosters-including-the-difference-between-moderna-and-pfizer-1.6130020

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