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SARS-CoV-2 variant evolution in the United States: High accumulation of viral mutations over time likely through serial Founder Events and mutational bursts.

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Since the first case of COVID-19 in December 2019 in Wuhan. China. SARS-CoV-2 has spread worldwide and within a year and a half has caused 3. 56 million deaths globally. https://excellentphoto.shop/product-category/production-editing-controllers/
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