Figure 5

(a-f). Evolution of the effective reproduction number, R, from 2004–05 to 2008–09 in the 28 Strategic Health Authorities in England for six possible scenarios for the under-estimation of vaccination coverage (the five SHAs in London are shown in red); the proportion of children recorded as unvaccinated who had received one dose and the proportion of children recorded as having received a single dose who had received two doses was assumed to be : a) 0%, b) 10%, c) 20%, d) 30%, e) 40% and f) 50%.