Fig. 4From: The impact of aggregating serogroups in dynamic models of Neisseria meningitidis transmissionEvidence for multiple attractors in the 4-strain model. Examples of simulations from vaccine scenarios 1–9 (a-i) that entered the basin of attraction for oscillatory solutions. Some oscillations push serogroup prevalence to zero, causing that serogroup to go extinct in the simulation (no rescue effects were allowed)Back to article page