Japanese researchers altered the insects' DNA and added an antigen - a compound that triggers an immune response - to the protein mix in mosquitos' saliva.
日本研究人员对蚊子的DNA做了修改，在其唾液的蛋白质结构中加入一种抗原，以达到激活免疫系统的效果。
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Immunological memory is defined functionally as an antigen induced altered state of the immune system persisting in the absence of antigen.