“…Using suitable transformations to reduce the number of parameters in predator-prey models and susceptible-infective-removed models has been widely used in other works. 4,5,16,19,21,[34][35][36][37] Recall that (x, ) ∈ R 2 is an equilibrium of (4) if it satisfies f (x, y) = 0 and g(x, ) = 0. An equilibrium point (x, y) is said to be positive if x, y ≥ 0 and to be a positive interior equilibrium if x, y > 0.…”