Optimal timing of one-shot interventions for epidemic control
Fig 11
(S,R) phase portrait (arrows indicate growing time) based on an SIR model in a single population with β = 2, γ = 1 (giving ) and initial condition I(0) = 0.01.
The plot shows a trajectory with no control (continuous red line) as well as three other trajectories where β = 0.5 for a time period of length D = 2 but with the intervention setting in only once I + R goes past 0.1 (partially dotted line), 0.3 (partially dashed line) and 0.5 (continuous broken line), respectively. Control for the three different scenarios sets in at the points denoted by A, B and C and control ends at A’, B’ and C’, respectively.