<P> Type I hypersensitivity ( or immediate hypersensitivity ) is an allergic reaction provoked by reexposure to a specific type of antigen referred to as an allergen . Type I is not to be confused with type II , type III , or type IV hypersensitivities , nor is it to be confused with Type I Diabetes or Type I of any other disease or reaction . </P>
<P> Type I hypersensitivity ( or immediate hypersensitivity ) is an allergic reaction provoked by reexposure to a specific type of antigen referred to as an allergen . Type I is not to be confused with type II , type III , or type IV hypersensitivities , nor is it to be confused with Type I Diabetes or Type I of any other disease or reaction . </P>
type of antigen that triggers an allergic reaction
type of antigen that triggers an allergic reaction
allergen
allergen