Fig. 4: Outbreaks in domestic birds were seeded by repeated introductions from wild birds, with some onward transmission.
From: Ecology and spread of the North American H5N1 epizootic
a, Phylogenetic reconstruction of transmission between wild and domestic birds. Taxa and branches are coloured by wild or domestic host status containing a 1:3 ratio of domestic to wild bird sequences. n = 1,080. b, The number of transitions from a given trait to another trait inferred through ancestral state reconstruction for each titration. c, The results of the PACT analysis for persistence in domestic and wild birds for each titration.
