Why are there are 4 types of allergy (or hypersensitivity) responses?
The discussion of the hygiene hypothesis and its attempt to explain why incidence of allergy and incidence of childhood infections are inversely correlated. All figures are either from Janeway's Immunobiology (9th ed.) where noted, or my own original figures.
Allergy by the UCSD Extension School: Applied Immunology (BIOL-40371) Spring Quarter 2021 This lecture summarizes how the immune system is inappropriately activated during allergic responses to innocuous environmental antigens, called food allergens.
Walnut allergy, peanut or shrimp allergy all need Orla Protein Elisa kits for the detection of the allergens.