Allergic Responses to Inhaled Antigens Occur When an Individual Is

Multiple Choice

Allergic responses to inhaled antigens occur when an individual is first sensitized to the antigen (i.e., the allergen) , inducing an immune response, and then has a subsequent exposure to the same antigen. The sensitization phase is characterized by:

A) Induction of IgA antibodies against the allergen
B) Activation of tissue-resident ILC3 cells following stimulation by the allergen
C) Induction of a CD4 T cell type II immune response
D) Production of high concentrations of IL-12 and IL-23 by tissue-resident dendritic cells
E) Recruitment of large numbers of neutrophils to the site of allergen entry