The virus that causes COVID-19 is not the same strain as first emerged from China. A new study shows it has changed slightly in a way that makes it more contagious to humans.
from WebMD Health https://ift.tt/3kAQpx6
The virus that causes COVID-19 is not the same strain as first emerged from China. A new study shows it has changed slightly in a way that makes it more contagious to humans.
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