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From escape mutations to wild strains: Here’s everything you need to know about Covid variants – CNBC

Here’s why the coronavirus mutates, why some variants are more problemtic than others and what that means for life-saving vaccines.

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This transmission electron microscope image shows SARS-CoV-2also known as 2019-nCoV, the virus that causes COVID-19. isolated from a patient in the U.S., emerging from the surface of cells cultured in the lab.
Even as global Covid-19 infections drop across the world, leading U.S. health officials are warning of a coming wave of infections as new, more contagious and possibly more deadly variants of the virus take hold in the U.S.
Scientists aren’t surprised by the emergence of the new variants and…

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