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Introduction and Objective: The oral food challenge (OFC) is the gold standard to diagnose food allergy (FA); however, it is not a procedure free from the risk of having significant allergic reactions, even life-threatening.The aims of our study were to evaluate the frequency of positive OFCs performed in children with a suspected diagnosis of IgE- and non-IgE-mediated (food protein-induced enterocolitis syndrome (FPIES)) FA and how the failed challenges were managed., Materials and Methods: A retrospective chart review was done on all children who have had OFCs in a tertiary-care pediatric allergy unit from 2017 to 2019., Results: 682 patients were enrolled and 2206 challenges were performed: 2058 (93%) for IgE-mediated FA and 148 (7%) for FPIES. There were 262 (11.8%) challenge failures. The transfer to the emergency department was required 3 times (1.1%). None of the failed challenges resulted in death or hospitalization and 13.3% challenges did not require any treatment., Conclusions: Our findings confirm that food challenges can be performed safely in a specialized setting by well-trained personnel; all food challenge reactions, even the most serious, were reversible, thanks to a prompt recognition and treatment that generally did not worsen over time., Competing Interests: The authors declare not to have conflict of interest.

Food allergy immunotherapy is a promising allergen-specific approach to manage food allergy in children, although it is not exempt from adverse events, even severe. The adverse events are not predictable and furthermore cofactors can play a role in triggering them. During the COVID-19 pandemic, patients on food allergy immunotherapy should be provided with suggestions on how to proceed in the event of COVID-19 infection occurring or is suspected. These recommendations would be of support to clinical practitioners dealing with patients on food allergy immunotherapy since there is little data in the literature on the topic., Competing Interests: The authors declare that they have no conflict of interest.