Figure 3

Comparison of models: Prior-vaccination coverage. Comparison of mean-field (a), one- and two age class network models ((b) and (c), respectively), for different prior vaccination coverage of 40% (solid curves) or 20% (dashed curves). For the two age class model, strain-1 and strain-2 infections occur in different age classes. The parameter δ = 0.9 (10% cross-immunity), and second strain infection begins at T* = 10 days after first-strain infection.