The present invention relates i.a. to a 4/91 IBV (infectious bronchitis virus) encoding for a heterologous S (spike) protein or fragment thereof. Further, the present invention relates to an immunogenic composition comprising said 4/91 IBV encoding for a heterologous S (spike) protein or fragment thereof. Furthermore, the present invention relates to methods for immunizing a subject comprising administering to such subject the immunogenic composition of the present invention. Moreover, the present invention relates to methods of treating or preventing clinical signs caused by IBV in a subject of need, the method comprising administering to the subject a therapeutically effective amount of an immunogenic composition according to the present invention.

Provided herein, inter alia, are complexes comprising nanoparticles attached to viral proteins or nucleic acids encoding said viral proteins. Methods for making and using said complexes are provided. Compositions including the complexes are contemplated to be useful for treating and/or preventing viral infections.

An immunogenic CD40-targeted trimeric MERS-CoV S1 fusion polypeptide as well as a corresponding polynucleotide encoding it and its use for safely inducing immune responses directed against MERS-CoV without inducing vaccine associated respiratory pathologies associated with non-targeted vaccines.

The disclosure provides coronavirus ribonucleic acid (RNA) vaccines as well as methods of using the vaccines and compositions comprising the vaccines.

The present invention provides new vaccines for felines and ferrets to aid in reducing shedding of severe acute respiratory syndrome coronavirus 2 by infected felines or ferrets. Methods of making and using the vaccines alone or in combinations with other protective agents are also provided.

The current disclosure provides a severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) spike-based DNA vaccine capable of eliciting immune response to a SARS-CoV-2 in a human subject upon administration. Also provided is a method of eliciting an immune response to a SARS-CoV-2 in a human subject by administering the SARS-CoV-2 spike-based DNA vaccine, for example, intramuscularly using a jet injector.

The present disclosure describes a unique viral peptide (VP) vaccine for preventing or treating viral diseases. The vaccine is produced synthetically and includes no production steps in biological cells (e.g. E. coli, CHO cells, yeast cells) that would require subsequent endotoxin assays/removal or viral clearance procedures. The hC peptide is synthesized separately from the VP, and following self-assembly of the hC, the VP is covalently coupled to form the VP-hC conjugate which can serve as a vaccine for preventing or treating viral diseases. The hC includes heptad repeats following a specific pattern. Optionally, the VP-hC conjugate further includes one or more T-cell epitopes at the N- and/or C-terminus of the one or more amphipathic alpha-helices. The present disclosure also describes compositions comprising immunogenic compositions including VP-hC conjugate.

Disclosed herein are immunogenic compositions for the prevention of infection with SARS-CoV-2. The immunogenic compositions comprise polypeptides, RNA, or DNA and are capable of inducing a long-term and broad immune response in a subject.

Recombinant protein coronavirus antigens and vaccine compositions using the same, include a recombinant protein that is a single-chain (SC) viral membrane protein complex derived from the spike (S), envelop (E) and membrane (M) protein of a coronaviruses such as SARS-CoV-2, the causal agent for COVID-19. Methods for immunization of a subject using the vaccine compositions treats or prevents clinical signs caused by coronaviruses infection.

The present disclosure provides T cell modulatory polypeptides (TMPs) that comprise an immunomodulatory polypeptide, class I HLA polypeptides (a class I HLA heavy chain polypeptide and a β2 microglobulin polypeptide), and a Betacoronavirus (e.g., a SARS-CoV-2) peptide that presents an epitope to a T-cell receptor. A TMP is useful for modulating the activity of a T cell, and for modulating an immune response in an individual.