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. 2021 Mar 26;422:132902. doi: 10.1016/j.physd.2021.132902

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Fig. 4 — Time development of infectious disease corresponding to the parameters $β = 0.5961$ and $γ = 0.8023$ . (a) $i_{0} = 0.0133$ , (b) $i_{0} = 0.1333$ and (c) $i_{0} = 0.3333$ .