Fig. 7
From: Dynamic modeling and optimal control of cystic echinococcosis
Effect of control cost for sheep vaccination: a–d Time series dynamics of infections, e–h The optimal control strategy. The solid and dashed curves correspond to the scenarios for \({C}_{2}=3\times {10}^{5}\) and \({C}_{2}=3\times {10}^{6}\), respectively. Here \({{C}_{1}=C}_{3}={C}_{4}=3\times {10}^{5}\), the values of other parameters and the initial conditions are same with those in Fig. 6