Figure 7.

Equilibria of stationary model. Three plots of panel (a) show equilibria of system (13) (x-solid, y-dashed) as functions of relative treatment intensity 0 <φ < 1, for selected values of the superinfection source S. Panel (b) does the same in terms of the variable 0 <S < 3 (source strength) for 3 selected treatment intensities. Three solid curves on each plot (in descending order) correspond to 3 values of clearing rate for resistant strain: b_X = 0.25 (highly resistant), 1 (medium); 4 (low).