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. 2021 Mar 25;11:6940. doi: 10.1038/s41598-021-85694-5

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© This is a U.S. Government work and not under copyright protection in the US; foreign copyright protection may apply 2021

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Demonstration of the utility of the dynamic curve using a pre-selected patient with severe COVID-19. Percent lung opacity was calculated from 3 serial chest CT’s. Deviation from the mild to moderate disease curve occurs 9 days after symptom onset, as a clinical "red flag".