The present invention provides a fusion polypeptide that induces a humoral immune response and a cellular immune response to a virus, containing antigens or fragments thereof of the following (a) and (b), and having an oligomerization activity: (a) an antigen of the virus or a fragment thereof containing a B cell epitope conserved among subtypes of the virus; and (b) an antigen of the virus or a fragment thereof containing a T cell epitope conserved among subtypes of the virus (wherein the antigen(s) or the fragment(s) thereof of (a) and/or (b) have an oligomerization activity, or the fusion polypeptide further contains (c) a polypeptide having an oligomerization activity in addition to the antigens or the fragments thereof (a) and (b)).

The present disclosure relates to a cluster-based consensus approach for generating recombinant hemagglutinin (HA) polypeptides. The disclosure further relates to influenza vaccine compositions comprising the recombinant HA polypeptides.

Described herein, are Bovine immunodeficiency virus gag protein (“Bgag”) recombinant virus like particles (“VLPs”) including one or more different types of target pathogen proteins. Also described, are compositions including the Bgag VLPs and the methods of making and using the novel Bgag VLP.

The disclosure relates to broad spectrum influenza virus ribonucleic acid (RNA) vaccines, as well as methods of using the vaccines and compositions comprising the vaccine. In a preferred embodiment, the vaccine is formulated as a lipid nanoparticle comprising at least one cationic lipid.

A method for synthesizing influenza virus-like particles (VLPs) within a plant or a portion of a plant is provided. The method involves expression of influenza HA in plants and the purification by size exclusion chromatography. The invention is also directed towards a VLP comprising influenza HA protein and plant lipids. The invention is also directed to a nucleic acid encoding influenza HA as well as vectors. The VLPs may be used to formulate influenza vaccines, or may be used to enrich existing vaccines.

Provided are octavalent influenza vaccine compositions comprising eight mRNA, each mRNA comprising an open reading frame encoding a different influenza antigen. Also provided are lipid nanoparticles (LNPs) for delivering said mRNA.

Disclosed are peptides comprising a monomeric Fc fragment of an immunoglobulin recognized by a neonatal receptor (FcRn); an influenza HA protein; and a trimerization domain. Disclosed are compositions comprising one or more of the peptides described herein. Disclosed are nucleic acid sequences capable of encoding any one of the peptides described herein. Disclosed are methods for eliciting a protective immune response against influenza comprising administering to a subject an effective amount of a composition comprising a monomeric Fc fragment of an immunoglobulin recognized by a FcRn; an influenza HA protein; and a trimerization domain, wherein the administering is to a mucosal epithelium. Disclosed are methods of treating a subject exposed to influenza or at risk of being exposed to influenza comprising administering to the subject an effective amount of a composition comprising a monomeric Fc fragment of an immunoglobulin recognized by a FcRn; an influenza HA protein; and a trimerization domain, wherein the administering is to a mucosal epithelium.

The present invention provides methods for modulating the immune response of a subject to a therapeutic agent, the method comprising administering an effective amount of a triphenylethylene (TRIP) compound with an effective amount of the therapeutic agent. In particular embodiments, the TRIP compound enhances the immune response of the subject to the therapeutic agent. In some embodiments, the TRIP compound is administered in different dosing schedules to provide a biphasic immunomodulation effect.

The present invention provides, among other things, methods, reagents, and systems for the treatment, detection, analysis, and/or characterization of influenza infections.

The application generally relates to the attenuation of a RNA virus or of a clone thereof and involves the alteration of sequence space, more particularly the reduction, of mutational robustness of said RNA virus or clone. The means of the application are more particularly dedicated to the attenuation of an infectious RNA virus or clone, for the production of immunogenic composition or vaccine. More particularly, the means of the application involve the replacement of codon(s) by different codon(s), which is(are) selected to differ by only one nucleotide from a codon STOP, more particularly by different but synonymous codon(s), which is(are) selected to differ by only one nucleotide from a codon STOP.