Figure 3: (a) The average number of newly infected individuals . Power-law distributions with exponent (Squares), (circles), (up triangles), and the exponential (down triangles). All have the same mean interactive time . (b) The generation time distribution for all . In both panels, the black lines have slopes −1.8, −1.5, and −1.2. The results show that and decay as a power law with the exponent . In the exponential case, decays fast, in stark contrast to the power-law case. The results are the average over independent runs.