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Proportion of influenza (sub)types by study, Europe, 2017/18 (n = 6,979)
DK: Denmark study; ES: Spain study; UK: United Kingdom study; EU-H: European hospital-based multi-country I-MOVE+ study; EU-PC: European primary care-based multi-country I-MOVE/I-MOVE+ study.
a Includes two influenza A(H1N1)pdm09/B co-infections; 98 of influenza A(H1N1)pdm09, 122 of A(H3N2) and 454 of B cases were also in ES.
The graph includes individuals excluded from the VE analysis due to missing covariates.
