Chimeric genes, compositions of chimeric genes, and compositions of polypeptides that are useful for the generation, enhancement, or improvement of an immune response to a target antigen. Some embodiments of the compositions include chimeric genes encoding hepatitis D antigen (HDAg) protein in combination with one or more self-cleavage 2A polypeptides and a preS1 polypeptide. In certain embodiments the self-cleavage polypeptide is P2A.

Disclosed herein are immunogenic compositions or product combinations of engineered hepatitis B and hepatitis D nucleic acids, genes, peptides, or proteins that can be used to illicit an immune response against a hepatitis B and/or hepatitis D infection. Also disclosed are methods of using the immunogenic compositions or product combinations in subjects to generate immune responses against HBV and/or HDV by administering the compositions or combinations with a nucleic acid prime and polypeptide boost approach.

Chimeric genes, compositions of chimeric genes, and compositions of polypeptides that are useful for the generation, enhancement, or improvement of an immune response to a target antigen. Some embodiments of the compositions include chimeric genes encoding hepatitis D antigen (HDAg) protein in combination with one or more self-cleavage 2A polypeptides and a preS1 polypeptide. In certain embodiments the self-cleavage polypeptide is P2A.

Disclosed herein are chimeric genes, compositions of chimeric genes, and compositions of polypeptides that are useful for the generation, enhancement, or improvement of an immune response to a target antigen. Some embodiments of the compositions include chimeric genes encoding hepatitis D antigen (HDAg) protein in combination with one or more self-cleavage 2A polypeptides and a preS 1 polypeptide. In certain embodiments the self-cleavage polypeptide is P2A.

Disclosed herein are chimeric genes, compositions of chimeric genes, and compositions of polypeptides that are useful for the generation, enhancement, or improvement of an immune response to a target antigen. Some embodiments of the compositions include chimeric genes encoding hepatitis D antigen (HDAg) protein in combination with one or more self-cleavage 2A polypeptides and a preS 1 polypeptide. In certain embodiments the self-cleavage polypeptide is P2A.

Described are methods of inducing a protective immune response against Lassa virus comprising administering a prophylactically effective amount of a nucleic acid molecule encoding a Lassa virus glycoprotein precursor (LASV GPC) to a subject in need thereof.

Disclosed are immunotherapeutic compositions and methods for preventing and/or treating hepatitis delta virus (HDV) infection, including yeast-based HDV immunotherapeutic compositions and methods of use of such compositions to prevent and/or treat HDV infection and symptoms and sequela thereof.

Disclosed are immunotherapeutic compositions and methods for preventing and/or treating hepatitis delta virus (HDV) infection, including yeast-based HDV immunotherapeutic compositions and methods of use of such compositions to prevent and/or treat HDV infection and symptoms and sequela thereof.

Disclosed are immunotherapeutic compositions and methods for preventing and/or treating hepatitis delta virus (HDV) infection, including yeast-based HDV immunotherapeutic compositions and methods of use of such compositions to prevent and/or treat HDV infection and symptoms and sequela thereof.