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Will the Covid virus keep threshing out new strains? Will we need repeated new vaccines?


Jeshan

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Very generally, viruses morph and spread to be less dangerous and less deadly to their hosts. Biologically, species that kill off their prey too fast cause their own extinction. Over the very long-term, Covid strains will therefore become less virulent to the point where a vaccine may no longer even be needed; most active Covid strains will eventually become just like a common cold, if they do not fizzle out altogether like the 1918 flu strain.

In the meantime, yes, I do agree a few more vaccines might be developed as some Covid strains might still be dangerous and potentially deadly.

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