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Incidence and etiology of fever following seasonal influenza vaccination in hospitalized patients

Abstract We conducted a retrospective cohort to examine the incidence and etiology of fever postinfluenza vaccination among hospitalized patients during the 2015–2016 influenza season. Fever occurred in 63 (1.5%) of 4,185 vaccinated patients. Medical patients had fever predominantly associated with concurrent infections; surgical patients had fever explained by noninfectious etiologies.