Coronavirus: so many variants, but vaccines are still effective – The Conversation

Viruses are constantly changing. This is because errors sometimes occur when they copy their genetic material. Some errors have no effect at all. Some might make the virus less viable. Some make it more benign, which means it can survive but doesn’t cause disease. The errors to watch for are those that might make the virus more infectious, or better able to avoid the immune system that is trying to counter them, either driven by natural infection or stimulated by a vaccine.

Origen: Coronavirus: so many variants, but vaccines are still effective

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