Genomic heterogeneity and clinical characterization of SARS-CoV-2 in Oregon
Alexa K. Dowdell,
Fred L. Robinson,
Thomas R. Ward,
Walter J. Urba,
Carlo B. Bifulco,
Posted 04 Aug 2020
medRxiv DOI: 10.1101/2020.07.30.20160069
Posted 04 Aug 2020
The first reported case of COVID-19 in the State of Oregon occurred in late February 2020, with subsequent outbreaks occurring in the populous Portland metro area but also with significant outbreaks in less-populous and rural areas. Here we report viral sequences from 188 patients across the hospitals and associated clinics in the Providence Health System in the State of Oregon dating back to the early days of the outbreak. We show a significant shift in dominant clade lineages over time in Oregon, with the rapid emergence and dominance of Spike D614G-positive variants. We also highlight significant diversity in SARS-CoV-2 sequences in Oregon, including a large number of rare mutations, indicative that these genomes could be utilized for outbreak tracing. Lastly, we show that SARS-CoV-2 genomic information may offer additional utility in combination with clinical covariates in the prediction of acute disease phenotypes.
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