在8月，配对血清样本的后续检测发现H5N1中和抗体效价增加4倍，这是符合世卫组织实验室确诊标准的检测结果。
In August, follow-up testing of paired-serum samples found a fourfold rise in neutralization antibody titer for H5N1, a test result which meets the WHO criteria for laboratory confirmation.
采用小鼠中和试验测定血清效价。
其中，仅S和S1蛋白重组质粒能够诱导中和抗体的产生，以S蛋白的效价为高。
Of three forms of S recombinant proteins, only S or S1 protein induced neutralizing antibody responses, antibody titer was increased by S protein immunization.
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