It has been detected in 19 countries and has a concentration in California, but should we be worried about this strain?
Two new studies suggest that a Covid-19 variant first discovered in California has been spreading rapidly through the state.
The findings come as the US ramps up its efforts to track and catalogue various forms of the mutating virus, and raise fresh questions about the circulation of the coronavirus in the country.
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February 26, 2021 at 02:29AM
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