Figure 7.

The effect of the number of within-host viral replication events between each transmission event, on the pathotype distributions for n = 25 and b = 1 in the vertical (shaded bars) and horizontal (open bars) models. (Upper Left) t = 1; (Upper Right) t = 10; (Lower Left) t = 25; (Lower Right) t = 50. The pathotype distributions were generated by computer simulation; each histogram represents the pathotype distribution averaged over 45,000 viral replication periods, after an initial settling-time of 5,000 viral replication periods.