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[quote=Anonymous][quote=Anonymous]Are allergic reactions usually not immediate? I don't understand how this lady died 45 mins after dinner.

https://floridapolitics.com/archives/661176-disney-world-lawsuit-woman-dies-from-food-allergies-after-disney-springs-dinner/[/quote]

Usually in the first hour, but symptoms can be delayed up to 11 hours per this source.

https://www.ncbi.nlm.nih.gov/books/NBK482124/

Anaphylaxis is most often a rapidly evolving presentation, usually within one hour of exposure. Roughly half of the anaphylactic-related fatalities occur within this first hour; therefore, the first hour after the initial symptom onset is the most crucial for treatment. It is important to note that the more rapid the onset and progression of symptoms, the more severe the disease process. Morbidity and mortality are most often related to loss of airway and distributive shock. Early recognition and aggressive treatment greatly reduce the risk of adverse outcomes.

The first hour is not the only time of concern, however, as anaphylactic reactions can also present in a biphasic manner in up to 20% of cases. Even after successful management of the initial presenting symptoms, there can be a recurrence of symptoms peaking 8 to 11 hours after the initial reaction. While the biphasic response is only clinically significant in 4 to 5% of patients with diagnosed anaphylaxis, the potentially fatal second reaction should not be dismissed after treatment of the initial reaction.[/quote]

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