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Childhood allergies, birth order and family size
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  • Published on:
    The hygiene hypothesis revisited
    • Wendy J Anderson, Consultant in Respiratory and General Medicine
    • Other Contributors:
      • Claire Butler, Graeme P Currie

    Dear Editor,

    The editorial by Cullinan suggests that the relationship between allergy, birth order and family size may not be completely explained by the hygiene hypothesis.[1] A role for infection in protecting against allergy has been under consideration for some years, although a credible mechanism has not been identified. It has been suggested that reduced exposure to infection in childhood shifted the balanc...

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    Conflict of Interest:
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