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Janeway CA Jr, Travers P, Walport M, et al. Immunobiology: The Immune System in Health and Disease. 5th edition. New York: Garland Science; 2001.

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Cover of Immunobiology

Immunobiology: The Immune System in Health and Disease. 5th edition.

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Figure 10.16. Protective immunity consists of preformed immune reactants and immunological memory.

Figure 10.16Protective immunity consists of preformed immune reactants and immunological memory

Antibody levels and effector T-cell activity gradually decline after an infection is cleared. An early reinfection is rapidly cleared by these immune reactants. There are few symptoms but levels of immune reactants increase. Reinfection at later times leads to rapid increases in antibody and effector T cells owing to immunological memory, and infection can be mild or even inapparent.


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