from FOX News https://ift.tt/3oSvAPA
How many variants of the coronavirus are there?
As a virus infects people, it can mutate as it makes copies of itself. Some mutations can be harmful to a virus, causing it to die out. Others can offer an advantage and help it spread.
from FOX News https://ift.tt/3oSvAPA
from FOX News https://ift.tt/3oSvAPA
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