The consistency of a particular pair of parameter values with each of the two experimental measures can be combined by finding the intersection of the two parameter regions. This region of intersection corresponds to those parameter values most consistent with the parallel plaque and viral yield experimental measurements for a particular strain. The extent of these regions, shown in Figure 6C for the A/Brisbane/59/2007 WT strain and Figure 6F for the H275Y mutant strain, is summarized in Table 2 . The region of intersection suggests that the latent infection period for the H275Y mutant (w7 h) is longer than that of the WT strain (1-3 h), while the infecting time of the mutant (v 5 min) is much shorter than that of the WT (30-80 min).