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(A) Phylogenetic tree of hemagglutinin gene sequences of influenza A (H3N2) viruses obtained from ILI patients, Israel, 2018–2019 season. Relevant influenza vaccine viruses appear in red letters. (B) Structure model of a representative influenza A (H3N2) virus belonging to the 3C.3a clade that circulated in Israel during the 2018–2019 season.
