Journal Article

Correlates of Vaccine-Induced Immunity

Stanley A. Plotkin and Stanley A. Plotkin

in Clinical Infectious Diseases

Published on behalf of Infectious Diseases Society of America

Volume 47, issue 3, pages 401-409
Published in print August 2008 | ISSN: 1058-4838
Published online August 2008 | e-ISSN: 1537-6591 | DOI: http://dx.doi.org/10.1086/589862
Correlates of Vaccine-Induced Immunity

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The immune system is redundant, and B and T cells collaborate. However, almost all current vaccines work through induction of antibodies in serum or on mucosa that block infection or interfere with microbial invasion of the bloodstream. To protect, antibodies must be functional in the sense of neutralization or opsonophagocytosis. Correlates of protection after vaccination are sometimes absolute quantities but often are relative, such that most infections are prevented at a particular level of response but some will occur above that level because of a large challenge dose or deficient host factors. There may be >1 correlate of protection for a disease, which we term “cocorrelates.” Either effector or central memory may correlate with protection. Cell-mediated immunity also may operate as a correlate or cocorrelate of protection against disease, rather than against infection. In situations where the true correlate of protection is unknown or difficult to measure, surrogate tests (usually antibody measurements) must suffice as predictors of protection by vaccines. Examples of each circumstance are given.

Journal Article.  5437 words.  Illustrated.

Subjects: Infectious Diseases ; Immunology ; Public Health and Epidemiology ; Microbiology

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