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. 2021 Jul 2;13(7):1295. doi: 10.3390/v13071295

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Logistic regression estimates for time trends between November 2020 and February 2021 for spike protein mutations identified in Polish isolates. Colored font describes lineages in which mutations was found.