The Variants of COVID-19

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Pfizer.com. 2021. How Do Viruses Mutate and What it Means for a Vaccine? | Pfizer. [online] Available at: <https://www.pfizer.com/news/hot-topics/how_do_viruses_mutate_and_what_it_means_for_a_vaccine> [Accessed 2 January 2022].

Centers for Disease Control and Prevention. 2021. How Flu Viruses Can Change. [online] Available at: <https://www.cdc.gov/flu/about/viruses/change.htm> [Accessed 2 January 2022].

Hopkinsmedicine.org. 2021. COVID Variants: What You Should Know. [online] Available at: <https://www.hopkinsmedicine.org/health/conditions-and-diseases/coronavirus/a-new-strain-of-coronavirus-what-you-should-know> [Accessed 5 January 2022]