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Cartoon suggesting the role of breastfeeding in the expression of asthma in an animal model for asthma when the mother has the inhaled allergen in the breastmilk along with TGF-β. The combination of small quantities of allergen in the presence of TGF-β in breastmilk renders the suckling offspring permanently tolerant to the allergen, thus preventing the expression of asthma. Reproduced with permission from Puddington and Matson.62
