Omicron has become a global threat to public health thanks to a particularly dangerous set of mutations, but where did it come from?
That the virus infected animals of some kind, acquired lots of mutations as it spread among them and then jumped back to people – a phenomenon known as reverse zoonosis., and specifically mice. But this could just be a coincidence.Most of the 7 billion people in the world have rodents living near their homes, if not inside them, so there have been countless opportunities for this to happen with mice or rats.
Omicron could have evolved gradually as it spread from person to person in one of the many parts of the world where little or no sequencing is done. But given
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