Figure 1. Probability maps predicting the occurrence of avian influenza (H5N1) in Thailand and Vietnam.

(a) and (c) show the probabilities derived from the phylogenetic trees analyses (see Figure S3(b)); (b) and (d) show the results of the modified local K function analysis, depicting the spatial distribution of outbreak clusters. The experimental data covers the H5N1 outbreaks from late 2003 to 2009.