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. 2021 Jan 7;143:110616. doi: 10.1016/j.chaos.2020.110616

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Fig. 3 — Typical behavior of the sub-population, $S_{Q}, S_{N}, I_{Q}, I_{N}, R$ . The successive infection peaks are due to the frequent oscillations in the strategies, even if the total susceptible and removed individuals do not oscillate. Here, $δ = 10, β_{N} = 10$ .