H9N2 avian influenza virus-derived natural reassortant H5N2 virus in swan containing the hemagglutinin segment from Eurasian H5 avian influenza virus with an in-frame deletion of four basic residues in the polybasic hemagglutinin cleavage site
Youling Wang, Xiaoyuan Yuan, Lihong Qi, Yuxia Zhang, Huaiying Xu, Jinxing Yang, Wu Ai, Wenbao Qi, Ming Liao, Dan Wang, Minxun Song, Feng Li
Abstract