Fig. 1From: Inferencing superspreading potential using zero-truncated negative binomial model: exemplification with COVID-19The demonstrative histogram shows the distribution of secondary cases number of each index case. For illustration, the histogram is generated by setting reproduction number, R = 2, and dispersion parameter, k = 0.5, for the negative binomial (NB) distribution. The index cases with 0 secondary case generated is divided into two sub-groups including sporadic (in green) and terminal cases (in blue)Back to article page