Fig 4. The effect of prophylactic mass vaccination for different ϵ = ϵs,i,γ values on the infection dynamics for continuous vaccination, i.e. λN = 0, λV = 0.0017 (left column), and one-off vaccination, i.e. λN = 0.0017, λV = 0 (right column).
A.-B. The vaccine only affects host susceptibility, i.e. sterilizing immunity ϵ = ϵs, ϵγ = ϵi = 0 (see relation (7)); C.-D. The vaccine only affects recovery rate, i.e. ϵ = ϵγ, ϵs = ϵi = 0 (see relation (9)); E.-F. The vaccine equally affects host susceptibility, infectivity and recovery rate, ϵ = ϵs,i,γ (see relations (7)–(9)). Other chosen parameter values were βNN = 0.12, γN = 0.01785, d = 0.001, μ = 0.0017, and the initial conditions are SV (0) = 0.999, IV (0) = 0.001 (see relation (11) for p = 1 and I0 = 0.001).