Fig. 2.

(a) A histogram of the R₀ estimates for B. burgdorferi obtained from 20,000 sets of parameters chosen randomly from uniform distributions after removing all cases where ${\widehat{R}}_0<1$. (b) The natural logarithmic transformation of the R₀ estimates. Graphs (c) and (d) give the normal probability plot for ln(R₀), with (d) obtained after removing the 500 largest and 500 smallest R₀ values.