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Comparison of the ensemble-mean severity index (left) and severity count (right) over yearly bins (0–1; 1–2; … 4–5) for three ensembles: (i) the aging cohort of Fig. 6 (black bars); (ii) the treated cohort of Fig. 7 (gray bars); and (iii) the vaccinated cohort of Fig. 8 (light gray bars). EIR = entomological inoculation rate.
