Viral isolation was preformed in MDCK cells and hemagglutination inhibition assay was used for subtype identification.
用MDCK细胞进行病毒分离，用血凝抑制试验对分离到的病毒标本进行分型鉴定。
2
The immune response profile following viral infection was analyzed by hemagglutination inhibition (hi) test for both acute and convalescent phase sera of the confirmed cases.