Evaluating the Usefulness of Retesting for Beta-lactam Allergy in Children

Many children with adverse reactions to beta-lactams are labeled as allergic without performing an allergy study to confirm it. In this retrospective study of 10 years, we detected only 3.3% positive cases. Although international guidelines recommend a second allergy workup in patients with a negative study, we found from our results a low profitability of retesting.

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