短語詞組短語avian H5N2 influenza virus vaccine 禽流感H5N1滅活杭原Avian Influenza AI 禽流感H5N1 subtype avian influenza H5N1 亞型禽流感avian influenza h n 禽流感h5n1型H5 avian influenza H5 禽流感mildly pathogenic avian influenza 低致病性禽流感Human avian influenza case 人禽流感病h subtype avian influenza 禽流感h9亞型Human H5N1 Avian Influenza 人禽流感 返回 avian influenza