FIG. 1.

A map of East Asia illustrating the geographic distribution of the NS5B gene data set (see also Fig. 3). Arrows indicate the countries of origin of the sequences and values in parentheses indicate the number of sequences from each country. Common subtypes present in each country (>20% of sequences) are shown in brackets. Note that the subtype distribution of NS5B sequences does not necessarily reflect the relative prevalence of infection by each subtype. Twelve isolates were sampled outside of Asia; available information indicates that at least seven of these were obtained from individuals of Asian origin.