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. 2023 Jun 16;15(6):1383. doi: 10.3390/v15061383

Figure 4.

Figure 4

Maximum clade credibility tree of the H5 HA gene of clade 2.3.4.4B H5N1 HPAI viruses from southern Africa in 2021–2022 and the closest relatives. The nodes values represent the posterior probability and the bars represent the 95% highest posterior probability range. Square brackets denote the regional sub-genotypes assigned in this study, where these are italicized, the sub-genotype was inferred from a partial genome. The grey bar highlights the period between early January and April 2021 when the progenitors to the H5N1 HPAI viruses causing the southern African outbreaks emerged and spread southwards.