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. 2021 Apr 30;147:110952. doi: 10.1016/j.chaos.2021.110952

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Fig. 2 — Trajectories of 3 model variables without drug therapy with $α = 0.7, 0.8, 0.9, 1.0$ along the time t (days), $p = 2.5 < δ_{v} = 2.6$ .