In PLoS Computational Biology, volume 2, issue 6: DOI:
The Figure 5 title and legend should read:
Figure
5 Variance of the Natural Logarithm of Size of Memory Lineages as the Function of the Number of Exposures in the Absence (squares, 0) and Presence (diamonds, ) of Variation in Cross-Reactivity between Different Memory Lineages
Other parameters are the same as in Figure 2B and 2D, and the mean cross-reactivity is kept the same at . Lines show the predictions according to Equation 9, and .