To ascertain whether the agglutinin is universal exising and how about its titer and deteclable time, the author studied the samples of saliva from 20 individuals.

• 为了探讨这些抗体在唾液中的存在是否带有普遍性,以及它们的效价和保存时间问题,作者收集了20个个体的血液和唾液样本进行了实验观察。