Assertion: allergy | /r/HasProperty | type
Facets:
Source sentences:
text: In the early stages of allergy, a type
text: In the early stages of allergy, a type I hypersensitivity reaction against an allergen, encountered for the first time, causes a response in a type of immune cell called a T H 2 lymphocyte, which belongs to a subset of T cells that produce a cytokine called interleukin-4 (IL-4).