University of College London scientists sampled and sequenced the genomes of virus samples from more than 7,500 people who caught COVID-19
Their findings suggest the pandemic began sometime between October 6 and December 11, 2019
The virus appears to be mutating about as frequently as expected
A March study suggested that two separate strains of coronavirus spread from China, with the more aggressive one becoming dominant in Europe and the US
Now, the University of College London researchers say that their study suggests just a single strain swiftly spread around the globe
It has mutated, but it’s unclear if those changes have made it more or less deadly
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