Figure 2.
Phylogeny of influenza A(H1) 1B swine sequence data and the viral sequence of the case in this report, United Kingdom, November 2023
UK: United Kingdom.
The influenza A(H1) 1A and 1C lineages have been collapsed and 1B second and third order lineages are labelled. Tip points are coloured by region in which they were sampled. The UK index case is indicated by the red tip point. Sequence data were collated from GISAID and NCBI virus, aligned with MAFFT v7.487 and trimmed manually in Aliview. Phylogeny was inferred using the maximum likelihood approach in IQ-Tree v2.1.4 with ModelFinder and 1,000 ultrafast bootstraps. Phylogeny was visualised using R version 4.1.1 with the libraries ggplot2, ggtree, ape and tidytree.
