Why are there many variations of viruses?

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Why are there many variants of viruses for example covid it has the delta variant and omicron variant how do viruses mutate and make new variants

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Anonymous 0 Comments

As viruses replicate they have random copying errors. Sometimes those errors lead to the surface of the viruses looking different. The surface that allows for more spread of infection starts to win over the less infective surface structure, and quickly becomes the predominant variant.

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