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Maximum-likelihood tree containing A/Thai-1 subset. For visualization of A/Thai-1 lineage, the A/Thai-1 genomes from Fig. 1 generated in this study are presented. The lineage defining node has a bootstrap value of 99 (1,000 replicates) as shown in Supplementary Fig. 1. Mutations that define each branch point are shown. 20,134G→U in Thailand_Bangkok-0030 could not be called. * indicates the sample with the ORF7a deletion.
