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Phylogenetic comparison of influenza A(H3N2) haemagglutinin genes, EU/EEA, weeks 40/2023–9/2024 (n = 639)
EEA: European Economic Area; EU: European Union.
The vaccine strains are bright red, reference strains black and sequences reported to TESSy coloured according to the virus collection date by month (2023: October brownish red, November yellow, December grey; 2024: January green, February, turquoise). Clades (subclades) are indicated on the branches or pointed by arrows.
