Repeated vaccination with tetanus toxoid of plasma donors with pre-existing specific IgE transiently elevates tetanus-specific IgE but does not induce allergic symptoms

IgE responses against allergens have acquired much attention due to their pathogenic nature as mediators of allergic reactions. In contrast, IgE responses against vaccines like Diphtheria-Tetanus-Pertussis (DTP) and the potential persistence of IgE production have received relatively little attention, presumably because of the low prevalence of allergic symptoms. In general, common early sensitivity reactions against vaccines, including tetanus toxoid, consist of mild local reactions and are not contraindicative of future vaccinations (1, 2). This article is protected by copyright. All rights reserved