D000368:Aged; D000369:Aged, 80 and over; D015331:Cohort Studies; D004632:Emergency Medical Services; D005260:Female; D006760:Hospitalization; D006801:Humans; D007252:Influenza Vaccines; D007251:Influenza, Human; D008297:Male; D006278:Medicare; D012189:Retrospective Studies; D016896:Treatment Outcome; D014481:United States; D015164:Vaccines, Inactivated
Izurieta Hector S HS ;Thadani Nicole N ;Shay David K DK ;Lu Yun Y ;Maurer Aaron A ;Foppa Ivo M IM ;Franks Riley R ;Pratt Douglas D ;Forshee Richard A RA ;MaCurdy Thomas T ;Worrall Chris C ;Howery Andrew E AE ;Kelman Jeffrey J 