As countries and experts keep warning about the rare side effects of the AstraZeneca vaccine, they look for other options. Canadian health officials have started reviewing research on mixing various COVID-19 vaccines in the same individual. 

The United Kingdom has already begun a study of mixing vaccine regimens and has found positive results. Some scientists are claiming that administering two doses of different products could actually boost a person’s immune response. They further explained that the person will achieve a greater immune response than if they were to take two doses of the same vaccine.

All vaccines in Canada and the U.K. follow the same two-dose schedule. The first is considered a “prime” dose and the second shot is the “boost” dose. Researchers at Oxford University are extensively evaluating the effects when mixing AstraZeneca with either Pfizer-BioNTech or Moderna.

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