Virus detectives tracking COVID-19 to its genetic origins

China reported its first cases of the new coronavirus in December. But was COVID-19 already silently circulating? To find out…

China reported its first cases of the new coronavirus in December. But was COVID-19 already silently circulating? To find out scientists are looking for “patient zeros” by tracking the evolution of the virus itself.

This genetic detective work is tracing the family tree of the coronavirus that has killed tens of thousands in its relentless spread across the planet.

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