Figure 2.

Estimated case counts and Relative Risk. Figure displays the estimated neuroinvasive disease case number (top) and Relative Risk (bottom) for US counties. Figures are color coded such that darker colors indicate more disease cases and higher Relative Risk. Map areas shown as white symbolize estimated values near zero. Relative Risk is the ratio of model estimated disease cases to the expected case number given the population size. A Relative Risk value of 1 indicates that model predicted cases were comparable to the expectation, values below 1 indicate locations of relatively low risk, and values above 1 suggest increased risk. Note that elevated Relative Risk areas do not always coincide with locations experiencing highest case counts.