enzaHongKongInfluenzaH1N1H2N2H3N2H1N1?199720031999H5N1H9N2H7N7H5N1WhatcancausePandemicInfluenza?NewHA:HumaninfluenzaAviruswithanovelhemagglutininoranovelhemagglutininandneuraminidasegene.(新的HA)Susceptibility:Lackofimmunitytothisnovelvirus,inalargeproportionofthepopulation.(易感性)Transmissibility:Demonstratedabilityofthevirustocausediseaseandspreadfromperson-to-person.(可传播性)Humaninfectionwithavianinfluenzaviruses?(~2004)?人感染禽流感病毒情况YearPlaceVirussubtypeCases(death)1995UKH7N711997HongKongH5N118(6)1999HongKongH9N222003H5N1H5N12(1)herlandsH7N784(1)2003HongKongH9N212004CanadaH7N322004EgyptH10N72FromH5N1全球感染情况)H5N1influenzainanimalsotherthanpoultry-2004?除家禽以外感染H5N1的动物Bird(禽类)--Ducksandgeese(鸭和鹅)--Crows,sparrows(乌鸦,麻雀)--Peregrinefalcon,eagle(猎鹰,鹰)Cats(猫科)--ats(家猫)--Tigers/leopard(虎/美洲豹)Pigs(猪)Man(人)
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