Observational Analysis of T Cell Responses to SPIREs for Multiple Allergens in Subjects With Allergy in North America

This is a research study intending to look at the response of a specific type of allergy cells in the blood (called T cells) to a a type of immunotherapy product known as SPIREs (Synthetic Peptide Immuno-Regulatory Epitopes), across a broad range of subjects. This is a non-interventional study in which no investigational product will be administered to any subject.