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. 2022 Nov 5;84(12):144. doi: 10.1007/s11538-022-01102-7

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Fig. 8 — Fraction of an advantageous virus, $V_{2}$ . a The quantity z(t) obtained by solving Eqs. (1–1c) is plotted as a function of time for several values of $R_{0}$ , obtained by changing the death rate, a. b The corresponding susceptible populations as functions of time. The rest of the parameters are $β_{1} = 0.1, β_{2} = 0.11, y_{1} (0) = 0.001, y_{2} (0) = 0.1 y_{1} (0)$