
We report 4 highly pathogenic avian influenza A(H5N1) clade 2.3.4.4.b viruses in samples collected during June 2023 from Royal terns and Cabot's terns in Brazil. Phylodynamic analysis revealed viral movement from Peru to Brazil, indicating a concerning spread of this clade along the Atlantic Americas migratory bird flyway.
Influenza A Virus, H5N1 Subtype, phylogenetic analysis, highly pathogenic avian influenza virus, R, Animals, Wild, H5N1, Infectious and parasitic diseases, RC109-216, Birds, Charadriiformes, wild bird, Influenza in Birds, Influenza, Human, Research Letter, Medicine, Animals, Humans, phylodynamic analysis, influenza, Brazil, Phylogeny
Influenza A Virus, H5N1 Subtype, phylogenetic analysis, highly pathogenic avian influenza virus, R, Animals, Wild, H5N1, Infectious and parasitic diseases, RC109-216, Birds, Charadriiformes, wild bird, Influenza in Birds, Influenza, Human, Research Letter, Medicine, Animals, Humans, phylodynamic analysis, influenza, Brazil, Phylogeny
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