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    UNDERSTANDING COVID VARIANTS

    May 15, 2021 2 minutes
    Text: Sonali Acharjee
    Graphic: Tanmoy Chakraborty

    HOW DOES A VARIANT TURN INTO A STRAIN?

    What is a mutation?

    A mutation is a change in the genetic sequence of a virus when it replicates. It is common for viruses to undergo several mutations over time.

    How fast does the Covid virus mutate?

    A typical SARS-CoV-2 virus accumulates only two single-letter mutations per

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