My first shot was AstraZeneca. Can I get Pfizer for a second dose? A U.K. study could give guidance this week

May 3, 2021 - All News

The immune system has two main weapons: neutralizing antibodies and T cells, and the different vaccines boost them in different ways.

With more and more Ontarians approaching eligibility for their second COVID-19 vaccine based on the recommended 16-week gap, many might be wondering: can I take a different vaccine the second time around?

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