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The incidence trends of influenza and RSV in Japan, 2008/09–2016/17. (A,B,C,D,E) Age-specific incidence trends of influenza and RSV infection based on age-specific incidence data; (F) an overall incidence trends of both infections among total population based on prefecture-specific data (i.e., incidence data by prefecture). Solid lines and dashed lines represent the observed data for influenza and RSV infection until 2016/17, respectively. RSV, respiratory syncytial virus.
