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Figure 4 | BMC Public Health

Figure 4

From: The impact of media coverage on the transmission dynamics of human influenza

Figure 4

Optimality effect when the weight constraint for the infected population varies and media has an adverse effect on the vaccine. Graphical representation of the optimality system when media coverage has an adverse effect on the vaccination rate and when the weight constraint for the infected population varies. (a) Graph of infectives. (b) Graph of vaccinated individuals. Initial conditions: S(0) = 20.0, I(0) = 25.0, V(0) = 50.0, R(0) = 40.0. The value of the weights used are (i) B1 = 0.0025 corresponds to variables with subscript 1 (++), (ii) B1 = 25.0 corresponds to variables with subscript 2 (xx), (iii) B1 = 250000.0 corresponds to variables with subscript 3 (**). The value B2 = 0.0025 is kept constant in all three cases.

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