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Pattern of SARS-CoV-2 variant B.1.1.519 emergence in Alaska
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Pattern of SARS-CoV-2 variant B.1.1.519 emergence in Alaska
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Pattern of SARS-CoV-2 variant B.1.1.519 emergence in Alaska
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Journal Article
Pattern of SARS-CoV-2 variant B.1.1.519 emergence in Alaska
2022
Overview
Alaska has the lowest population density in the United States (US) with a mix of urban centers and isolated rural communities. Alaska’s distinct population dynamics compared to the contiguous US may have contributed to unique patterns of SARS-CoV-2 variants observed in early 2021. Here we examined 2323 SARS-CoV-2 genomes from Alaska and 278,635 from the contiguous US collected from December 2020 through June 2021 because of the notable emergence and spread of lineage B.1.1.519 in Alaska. We found that B.1.1.519 was consistently detected from late January through June of 2021 in Alaska with a peak prevalence in April of 77.9% unlike the rest of the US at 4.6%. The earlier emergence of B.1.1.519 coincided with a later peak of Alpha (B.1.1.7) compared to the contiguous US. We also observed differences in variant composition over time between the two most populated regions of Alaska and a modest increase in COVID-19 cases during the peak incidence of B.1.1.519. However, it is difficult to disentangle how social dynamics conflated changes in COVID-19 during this time. We suggest that the viral characteristics, such as amino acid substitutions in the spike protein, likely contributed to the unique spread of B.1.1.519 in Alaska.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
