Hemagglutinininhibition test was performed to detect titer of antiserum.
通过血凝抑制实验检测抗血清的抗体滴度。
2
Primary immunogenicity end points were the rates of 4-fold or greater increases in serum hemagglutinininhibition antibody to each of the 3 vaccine strains before and 28 days after inoculation.