Figure 5From: Modeling the spread of porcine reproductive and respiratory syndrome virus (PRRSV) in a swine population: transmission dynamics, immunity information, and optimal control strategies(a) & (d) Optimal vaccination coverage and vaccination rate and their optimal results; (b) & (e) Optimal vaccination coverage and vaccination rate and their optimal results when the death rate is varied \(\mu =1,2,3\); (c) & (f) Optimal vaccination and vaccination rate and their optimal results when the recovery rate is varied \(\gamma =365/28,365/56,365/84\)Back to article page