The present invention provides compositions and systems for delivery of nanocarriers to cells of the immune system. The invention provides vaccine nanocarriers capable of stimulating an immune response in T cells and/or in B cells, in some embodiments, comprising at least one immunomodulatory agent, and optionally comprising at least one targeting moiety and optionally at least one immunostimulatory agent. The invention provides pharmaceutical compositions comprising inventive vaccine nanocarriers. The present invention provides methods of designing, manufacturing, and using inventive vaccine nanocarriers and pharmaceutical compositions thereof. The invention provides methods of prophylaxis and/or treatment of diseases, disorders, and conditions comprising administering at least one inventive vaccine nanocarrier to a subject in need thereof.

The present invention relates to a vaccine comprising Open Reading Frame 2 (ORF2) protein of Swine Hepatitis E virus (HEV) and a pharmaceutically acceptable carrier, for use in the protection of anti-HEV MDA-positive piglets against HEV fecal shedding.

The disclosed compositions and methods relate to an immunogenic composition that, in certain aspects, comprise cationic liposomes; a mixture of toll like receptor 3 (TLR3) and toll like receptor 9 (TLR9) ligands; and a cellular adhesion agent, and methods of using such compositions. In certain aspects, disclosed compositions are administered to a mammal to induce a non-specific innate immune response at mucosal surfaces. In further aspects, disclosed compositions are administered to a mammal in conjunction with an antigen to enhance the immune response of the mammal to the antigen.

Provided herein are diagnostics and vaccines to identify control and prevent novel porcine orthoreovirus type 3 (POV3) isolated from diarrheic feces of piglets from outbreaks in three states and ring-dried swine blood meal from multiple sources.

Embodiments of a novel platform for delivering a peptide antigen to a subject to induce an immune response to the peptide antigen are provided. For example, nanoparticle polyplexes are provided that comprise a polymer linked to a peptide conjugate by an electrostatic interaction. The conjugate comprises a peptide antigen linked to a peptide tag through an optional linker. An adjuvant may be included in the nanoparticle polyplex, linked to either the polymer or the conjugate, or admixed with the nanoparticles. The nanoparticle polyplex can be administered to a subject to induce an immune response to the peptide antigen.

Ferritin proteins comprising a mutation replacing a surface-exposed amino acid with a cysteine, an N- or C-terminal linker comprising a cysteine, and/or one or more immune-stimulatory moieties linked to the ferritin protein via a surface-exposed amino acid are disclosed. The ferritin proteins can further comprise a non-ferritin polypeptide and be antigenic, e.g., for use in eliciting antibodies against the non-ferritin polypeptide.

This disclosure relates to antigenic EBV polypeptides and their use in eliciting antibodies against EBV. Also disclosed are antigenic polypeptides comprising an EBV polypeptide and a ferritin protein.

Compositions comprising an antigen, a carbohydrate, and a metabolizable oil, methods of administering such compositions to a subject, methods of making such compounds, and related compositions, methods, and uses.

Immunogenic compositions and methods of using them include a biodegradable or bioerodible polyanhydride nanoparticle comprising 1,8-bis(p-carboxyphenoxy)-3,6-dioxaoctane (CPTEG) and 1,6-bis(p-carboxyphenoxy)hexane (CPH) copolymers, an immunogenic protein of an Influenza Virus and an adjuvant entrapped within an interior of the nanoparticle, and an excipient. The immunogenic composition may be administered to a subject to confer both local and systemic immunity to the Influenza Virus.

Provided herein are compositions comprising novel MHC class II T cell epitopes and method using thereof. In some embodiments, a composition described herein comprises an immunogenic polypeptide comprising an MHC class II T cell epitope and a target antigen. In some embodiments, the target antigen is a viral, bacterial, parasite or tumor specific antigen. In some embodiments, the target antigen comprises a virus, bacteria, parasite or tumor specific polypeptide. In some embodiments, the composition comprises a fusion polypeptide comprising the immunogenic polypeptide and the target polypeptide. Also provided are polynucleotides encoding the fusion polypeptide, and methods of administering a composition comprising the polynucleotide to a subject to elicit an immune response. In some embodiments, the polynucleotide is an RNA comprising modified ribonucleotides.