But it need long period and is apt to be limited by season.Based on coat protein (CP) of virus, serology detects virus during peculiar immunology reaction of antibody and antigen.

• 血清学技术是利用病毒外壳蛋白的抗原性，据特异性的抗体抗原免疫学反应检测病毒存在，但制备杭血清需时间长，对含量少和无蛋白外壳的病毒无法检测；