Abstract: The present invention encompasses the surprising finding that nanoparticle compositions can have beneficial effects on allergy even when prepared without a known specific allergy therapeutic. The present invention provides such nanoparticle compositions. In some embodiments, provided nanoparticles are associated with functional elements that cause the nanoparticles to mimic bacterial cells. The present invention encompasses the surprising finding that provided nanoparticles may be useful for treatment and/or prevention of multiple different allergies in a single patient. The present invention encompasses the recognition that provided empty nanoparticles may be useful as a “pan-allergy” therapeutic and/or vaccine.

Abstract: The present invention provides, among other things, nanoparticle compositions including a plurality of nanoparticles, each of which is comprised of a biodegradable or biocompatible polymer arranged in a nanoparticle structure defining an internal lumen and an external surface and one or more of a preparation of hydrophilic cellular components and a preparation of hydrophobic cellular components. In some embodiments, the preparation of hydrophilic cellular components is encapsulated within the internal lumen and the preparation of hydrophobic cellular components is associated with the external surface. Various methods of making and using disclosed nanoparticle compositions are also provided.