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 present disclosure provides engineered SARS-CoV-2 spike ectodomain polypeptides and cells for producing such a polypeptide, as well as compositions and methods thereof.

The present disclosure provides engineered SARS-CoV-2 spike ectodomain polypeptides and cells for producing such a polypeptide, as well as compositions and methods thereof.

The present disclosure relates to immunogenic compositions comprising a severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) antigen, and a toll-like receptor 9 (TLR9) agonist, such as an oligonucleotide comprising an unmethylated cytidine-phospho-guanosine (CpG) motif. The immunogenic compositions are suitable for stimulating an immune response against a SARS-CoV-2 in an individual in need thereof.

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.

Compositions are disclosed that include alum and a SARS-CoV-2 Spike (S) glycoprotein variant covalently bound to the alum via at least one linker having 2-12 phosphoserine residues, where the S glycoprotein variant includes a receptor binding domain (RBD) having a mutation of at least one amino acid residue in an angiotensin-converting enzyme 2 (ACE2) receptor binding motif (RBM) relative to a wild-type RBD, where the residue is (i) hydrophobic; and (ii) within an aggregation-prone region of about 3-15 amino acid residues, and the mutation is a substitution of the hydrophobic residue with a different amino acid residue; as are compositions and vaccines including the compositions, and methods for their use.

Compositions are disclosed that include alum and a SARS-CoV-2 Spike (S) glycoprotein variant covalently bound to the alum via at least one linker having 2-12 phosphoserine residues, where the S glycoprotein variant includes a receptor binding domain (RBD) having a mutation of at least one amino acid residue in an angiotensin-converting enzyme 2 (ACE2) receptor binding motif (RBM) relative to a wild-type RBD, where the residue is (i) hydrophobic; and (ii) within an aggregation-prone region of about 3-15 amino acid residues, and the mutation is a substitution of the hydrophobic residue with a different amino acid residue; as are compositions and vaccines including the compositions, and methods for their use.

Multi-epitope, pan-coronavirus recombinant vaccine compositions featuring a combination of highly conserved B cell epitopes, highly conserved CD4+ T cell epitopes, and highly conserved CD8+ T cell epitopes, at least one of which is derived from a non-spike protein. The present invention uses several immuno-informatics and sequence alignment approaches and multiple immunological assays in vitro using human blood and saliva samples from COVID patients and healthy patients to identify several human B cells, CD4+ and CD8+ T cell epitopes that are highly conserved and antigenic in vitro. The Invention also used an in vivo unique mouse model of ACE2/HLA-A0201/HLA-DR triple transgenic mouse model to test the immunogenicity and the protective efficacy against SARS-CoV-2 infection and COVID-Like symptoms, of the identified B and T cell epitopes and of the resulting multi-epitope-pan-Coronavirus vaccine candidates. The vaccine compositions herein have the potential to provide long-lasting B and T cell immunity regardless of Coronaviruses mutations.

Multi-epitope, pan-coronavirus recombinant vaccine compositions featuring a combination of highly conserved B cell epitopes, highly conserved CD4+ T cell epitopes, and highly conserved CD8+ T cell epitopes, at least one of which is derived from a non-spike protein. The present invention uses several immuno-informatics and sequence alignment approaches and multiple immunological assays in vitro using human blood and saliva samples from COVID patients and healthy patients to identify several human B cells, CD4+ and CD8+ T cell epitopes that are highly conserved and antigenic in vitro. The Invention also used an in vivo unique mouse model of ACE2/HLA-A0201/HLA-DR triple transgenic mouse model to test the immunogenicity and the protective efficacy against SARS-CoV-2 infection and COVID-Like symptoms, of the identified B and T cell epitopes and of the resulting multi-epitope-pan-Coronavirus vaccine candidates. The vaccine compositions herein have the potential to provide long-lasting B and T cell immunity regardless of Coronaviruses mutations.