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Cox proportional hazard model results of return to usual activities or health as a function of total FLU-PRO Plus scores (top figure) or domain-specific FLU-PRO Plus scores (bottom figure). Partially vaccinated participants (n = 25) were dropped from the data set for this analysis. Abbreviations: FLU-PRO Plus, inFLUenza Patient-Reported Outcome Plus; GI, gastrointestinal.
