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Comparison of observed and predicted age-specific incidences. (A,B) Age-specific log incidence of influenza (A) and RSV (B) infection, from the analysis of age-specific data. As most reported influenza and RSV infection cases occur in those aged <9 years, a logarithm scale is used in both figures to allow visibility of the fitness in every age-group. Each line represents the predicted incidence, while each sign represents the observed incidence data. RSV, respiratory syncytial virus.
