: How many variations of coronavirus are there and how can a vaccine address all of them? I have read that there are 7 types of coronavirus disease. I have also heard that there are more than 3000 variations of this disease.

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How many variations of coronavirus are there and how can a vaccine address all of them?
I have read that there are 7 types of coronavirus disease. I have also heard that there are more than 3000 variations of this disease. How much variations are there? Also, how can a vaccine address all of them? How will the vaccine address for example a mutation of the virus that will emerge next year? Or the year after?

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