Journal
INTERNATIONAL JOURNAL OF IMMUNOPATHOLOGY AND PHARMACOLOGY
Volume 26, Issue 2, Pages 283-290Publisher
SAGE PUBLICATIONS INC
DOI: 10.1177/039463201302600201
Keywords
vaccine; immunization; auto immunity; autoimmune diseases; children
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Vaccines have eradicated or controlled many infectious diseases, saving each year millions of lives and quality of life of many other millions of people. In spite of the success of vaccines over the last two centuries, parents (and also some health care workers) gloss over the devastating consequences of diseases, which are now avoided thanks to vaccines, and direct their attention to possible negative effects of immunization. Three immunological objections are raised: vaccines cause antigenic overload, natural immunity is safer and better than vaccine-induced immunity, and vaccines induce autoimmunity. The last point is examined in this review. Theoretically, vaccines could trigger autoimmunity by means of cytokine production, anti-idiotypic network, expression of human histocompatibility leukocyte antigens, modification of surface antigens and induction of novel antigens, molecular mimicry, bystander activation, epitope spreading, and polyclonal activation of B cells. There is strong evidence that none of these mechanisms is really effective in causing autoimmune diseases. Vaccines are not a source of autoimmune diseases. By contrast, absolute evidence exists that infectious agents can trigger autoimmune mechanisms and that they do cause autoimmune diseases.
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