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Coronavirus strains first detected in California are officially 'variants of concern,' CDC says
CNN
Two coronavirus strains first detected in California are now officially "variants of concern," according to the US Centers for Disease Control and Prevention.
The variants may be about 20% more transmissible, the CDC said, citing early research. Some Covid-19 treatments may also be less effective against the strains. Still, the CDC didn't say that vaccines would stop working against them.More Related News