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Fig. 3 | BMC Infectious Diseases

Fig. 3

From: Detecting signals of seasonal influenza severity through age dynamics

Fig. 3

Retrospective and early warning severity indexes compared to the benchmark. a Retrospective severity (\(\overline {\rho _{s, r}}\)) has a positive relationship with the benchmark (R= 0.71, p-value = 0.05). b Early warning severity (\(\overline {\rho _{s, w}}\)) has a positive relationship with the benchmark (R= 0.59, p-value = 0.16). The 2003–04 season was removed because it was an early flu season and the early warning period occurred after the retrospective period. Point color corresponds to qualitatively-assigned severity category, where red is severe, yellow is moderate, and blue is mild

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