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Childhood immunisations and the development of atopic disease
  1. C Grüber
  1. Correspondence to:
    Dr C Grüber
    Department of Paediatric Pneumology and Immunology, Charité–Universitary Medicine Berlin, A Joint Institution of Free University and Humboldt University, Augustenburger Platz 1, D-13353 Berlin, Germany;

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Commentary on the paper by Bremner et al (see page 567)

Parents of children at heightened risk for atopy are frequently concerned about early immunisations. Apart from concerns about rare allergic reactions to the vaccine antigens or contaminants themselves (reviewed in Grüber and colleagues1), there exists a fear that immunisations may promote the development of atopic disease, leading to delayed or incomplete vaccination of these children. Some reports about an association of immunisation and atopic disease have fuelled this fear.

Moreover, the rising prevalence of allergic diseases in many industrialised countries has been associated with improvement in hygiene standards. It is thought that a lack of microbial stimuli delays the maturation from the fetal Th2 skewed immune system towards the more Th1 balanced immune system of the school child, and thus renders children more susceptible to Th2 dependent allergic disease. In this context, early childhood vaccinations have been viewed as a promoter of atopy development, either directly by the administration of agents which induce a Th2-type immune response or indirectly by the prevention of infections which otherwise would induce a preferential Th1-type immune response, and would thus skew the cytokine balance away from atopy.2

What is the currently available evidence for an atopy promoting effect of early childhood immunisations? An IgE response to vaccine antigens is commonly detectable in the sera of vaccinated children. About 50% of infants have detectable IgE against diphtheria/tetanus after primary vaccination,3 and after booster vaccination later in life more than 90% of vaccinees have detectable IgE against the vaccine antigens.4 The IgE response to vaccine antigens seems to be more pronounced among atopic individuals,3,5 but the correlation of IgE and protective IgG against the vaccine antigens is poor.6,7 IgE formation against …

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  • Competing interests: none declared

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