Notable COVID-19 Variants in the United States

According to the CDC, currently, there are four notable COVID-19 variants in the United States: B.1.1.7 (Alpha): This variant was first detected in the United States in December 2020. It was initially detected in the United Kingdom. B.1.351 (Beta): This variant was first detected in the United States at the end of January 2021. It …

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