Characteristics of Pathogenic and HA Antigenic Variation of H9N2 Subtybe Avian Influenza Viruses Isolated from 1998 to 2008 in China
Characteristics of Pathogenic and HA Antigenic Variation of H9N2 Subtybe Avian Influenza Viruses Isolated from 1998 to 2008 in China
不同H9N2亚型禽流感病毒分离株致病力研究及HA抗原性变异分析