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. 2021 May 18;13(5):935. doi: 10.3390/v13050935

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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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Time evolution of the predicted overall fitness $Φ$ . (a) Average fitness $〈 Φ 〉$ per month for the SARS-CoV-2 strains collected from the GISAID database [46] as a function of time; (b) Probability distribution of $Φ$ for the SARS-CoV-2 strains collected from GISAID during a given month.