▁between ▁January ▁ 1 ▁and ▁April ▁ 1 8 , ▁which ▁is ▁higher ▁than ▁the ▁combined ▁world wide ▁death ▁to ll ▁for ▁the ▁sw ine ▁flu . ▁ ▁As ▁of ▁May ▁ 2 8 , ▁ 2 0 1 0 , ▁the ▁official ▁death ▁to ll ▁attributed ▁directly ▁to ▁the ▁novel ▁H 1 N 1 ▁and ▁season al ▁influen za ▁was ▁ 2 , 1 1 7 . ▁ ▁This ▁total ▁exceed s ▁the ▁ 8 4 9 ▁death s ▁directly ▁attributed ▁to ▁season al ▁influen za ▁in ▁ 2 0 0 6 . ▁ ▁Many ▁of ▁the ▁other ▁death s ▁commonly ▁attributed ▁to ▁influen za ▁are ▁caused ▁by ▁complicated ▁influen za , ▁where ▁a ▁second ▁in fection ▁causes ▁death , ▁usually ▁p neum onia ▁( of ▁which ▁ 4 8 , 6 5 7 ▁of ▁ 5 5 , 4 7 7 ▁official ▁death s ▁in ▁ 2 0 0 6 ▁occurred ▁in ▁people ▁aged ▁ 6 5 ▁years ▁and ▁older ). ▁The ▁final ▁estimate ▁was ▁of ▁over ▁ 1 2 , 0 0 0 ▁death s ▁over ▁the ▁course ▁of ▁the ▁pan demic ▁( A pril ▁ 2 0 0 9 ▁– ▁April ▁ 2 0 1 0 ). ▁ ▁Response ▁The ▁Federal ▁response ▁remained ▁at ▁US ▁Pan demic ▁Stage ▁ 0 , ▁con gru ent ▁with ▁the ▁World ▁Health ▁Organ ization ▁( W HO ) ▁Pan demic ▁Ph ases ▁ 1 , ▁ 2 ▁and ▁ 3 ; ▁however , ▁the ▁W HO ' s ▁Pan demic ▁Ph ase ▁was