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. 2019 Dec 12;5:1–11. doi: 10.1016/j.idm.2019.12.002

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© 2019 The Authors

This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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Fig. 3 — The solution trajectory of system (2) with values from Table 2 starting from $(N_{1} (0), I_{1} (0), V_{1} (0), N_{2} (0), I_{2} (0), V_{2} (0)) = (281.87, 83.23, 0,2.28, 2.25, 0)$ after $T = 365$ days for several scenarios from the top to the bottom: with only $u_{1}$ , only $u_{2}$ , and both controls. Final values are given in Table 5.