In Figure 3B , we illustrate control of an epidemic for which all parameters are identical to Figure 3A , except that the workplace/social group size is 12 (instead of 8, as in Figure 3A ), and the probability of finding workplace/ social contacts is 60% (instead of 80%, as in Figure 3A ). In this case, the larger size of the workplace/social groups and the lower contact finding probability makes it necessary to have a higher ring vaccination capacity to attain a high probability of containing the epidemic, and on average it takes longer for eradication to finally occur.