Despite efforts to vaccinate and control the population of infected birds, H5N1 is considered firmly entrenched in bird populations across large parts of Asia.
Despite efforts to vaccinate and control the population of infected birds, H5N1 is considered firmly entrenched in bird populations across large parts of Asia.
尽管人们努力接种疫苗和控制已感染的禽鸟数量，但H5N1病毒仍顽强地存于亚洲大部分地区禽鸟群内。