Disclosed are a recombinant RBD protein of SARS-CoV-2, and a method for preparing the same. The recombinant RBD protein has a signal polypeptide sequence, an RBD protein sequence, a transmembrane domain sequence and a tag sequence in order from N-terminus to C-terminus. The recombinant RBD protein may be expressed on cell membranes, which facilitates protein stability, enrichment and detection.

Disclosed are a recombinant RBD protein of SARS-CoV-2, and a method for preparing the same. The recombinant RBD protein has a signal polypeptide sequence, an RBD protein sequence, a transmembrane domain sequence and a tag sequence in order from N-terminus to C-terminus. The recombinant RBD protein may be expressed on cell membranes, which facilitates protein stability, enrichment and detection.

The present invention relates i.a. to a recombinant avian coronavirus spike protein or fragment thereof comprising a mutation at amino acid position 267 to Cysteine. Further, the present invention relates to an immunogenic composition comprising an avian coronavirus with such spike protein.

Disclosed herein are fusion polypeptides comprising: (i) a fragment antigen comprising an epitope of a target protein antigen; and (ii) a complement binding polypeptide. The disclosure also provides fusion polynucleotides (e.g., mRNA) encoding the same. Also disclosed herein are methods of making and using the fusion polypeptides and fusion polynucleotides of the present disclosure.

Disclosed herein are fusion polypeptides comprising: (i) a fragment antigen comprising an epitope of a target protein antigen; and (ii) a complement binding polypeptide. The disclosure also provides fusion polynucleotides (e.g., mRNA) encoding the same. Also disclosed herein are methods of making and using the fusion polypeptides and fusion polynucleotides of the present disclosure.

The multi-epitope SARS-COV2 Spike peptides are analyzed for their ability to form association or binding complex with HLA-DR1 and human TLR8 by using computer modeling and molecular docking experiments. These peptides are identified as candidates for vaccine development as well as antibody-based immunotherapy.

The multi-epitope SARS-COV2 Spike peptides are analyzed for their ability to form association or binding complex with HLA-DR1 and human TLR8 by using computer modeling and molecular docking experiments. These peptides are identified as candidates for vaccine development as well as antibody-based immunotherapy.

The disclosure provides nanoemulsion compositions and methods of making and using thereof to deliver a bioactive agent such as a nucleic acid to a subject. The nanoemulsion composition comprises a hydrophobic core based on inorganic nanoparticles in a lipid nanoparticle that allows imaging as well as delivering nucleic acids. Methods of using these particles for treatment and vaccination are also provided.

The disclosure provides nanoemulsion compositions and methods of making and using thereof to deliver a bioactive agent such as a nucleic acid to a subject. The nanoemulsion composition comprises a hydrophobic core based on inorganic nanoparticles in a lipid nanoparticle that allows imaging as well as delivering nucleic acids. Methods of using these particles for treatment and vaccination are also provided.

This invention relates to an immunogenic agent comprising a hydrophobic peptide covalently coupled or conjugated to at least one antigenic molecule that facilitates self-assembly of a plurality of the immunogenic agents into an immunogenic complex that has adjuvant properties. The invention also relates to a method of eliciting an immune response in a subject, comprising the step of administering to the subject at least one immunogenic agent or at least one immunogenic complex to thereby elicit an immune response in the subject.