The present disclosure relates to hybrid hepadnavirus core antigens including one or more epitopes of a human hepatitis B vims (HBV) antigen. More specifically, the present disclosure relates to hybrid hepadnavirus core antigens in the form of fusion proteins containing a fragment of the PreS1 region of the HBV surface antigen inserted in a woodchuck hepadnavirus core antigen. The present disclosure further relates to hybrid hepadnavirus core antigens in the form of fusions proteins containing a truncated HBV core antigen and woodchuck hepadnavirus core antigen. Also provided are nucleic acids encoding the hybrid core antigens, and the use of the hybrid core antigens and nucleic acids for treating HBV-infected individuals.

The present invention provides an immune enhancer comprising at least an interferon and a granulocyte-macrophage colony-stimulating factor, and an immunotherapeutic pharmaceutical composition comprising at least an antigen and the above-mentioned immune enhancers. The present invention further discloses a preparation method of the immunotherapeutic pharmaceutical composition, the use of the immune enhancer and the immunotherapeutic pharmaceutical composition. The immune enhancer can be applied to disease and tumor treatments caused by viruses, bacteria, and other microorganisms.

An immune enhancer comprising at least an interferon and a granulocyte-macrophage colony-stimulating factor, and an immunotherapeutic phar-maceutical composition comprising at least an antigen and the above-mentioned immune enhancers is disclosed. A preparation method of the immunotherapeutic pharmaceutical composition, the use of the immune enhancer and the immunotherapeutic pharmaceutical composition are also disclosed. The immune enhancer can be applied to disease and tumor treatments caused by viruses, bacteria, and other microorganisms.

The present invention is directed to improved methods of Enterovirus inactivation by formaldehyde in presence of tromethamine buffer resulting in maximum recovery of D-antigen. Subsequent adsorption of said sIPV on aluminium hydroxide provides significantly dose reduced sIPV compositions.

A specific conformational epitope of a hepatitis B surface antigen and a hepatitis B neutralizing antibody binding thereto are disclosed. The epitope has a specific conformational structure. In addition, the conformational epitope does not contain the ‘a’ determinant that may generate an escape mutation upon administration of conventional vaccines or HBIg. Thus, an antibody capable of binding to the epitope is highly unlikely to allow the emergence of a vaccine escape mutation, which is caused by conventional vaccines, and as such, can retain a sustained effect. Therefore, such an antibody or a vaccine composition can find effective applications in the prevention and treatment of HBV, having great economic value.

The present disclosure provides oral antigenic compositions comprising a recombinant Spirulina comprising at least one exogenous antigenic epitope. Oral antigenic compositions of the present disclosure can be used as vaccines. Oral antigenic compositions of the present disclosure can be used to induce a protective immune response to infectious microorganism, tumor antigens, or self-antigens.

A platform enabling the manufacture of thermostable vaccines by incorporating recombinantly expressed, viral envelope proteins in their native conformation into ether glycerophospholipid nanodisc structures that simulate the natural environment of the envelope proteins. The ether glycerophospholipids include ether-linked hydrophobic side chains, and are derived from or modeled after those found in thermophile bacteria, which increase thermostability, thereby significantly enhancing the vaccine's potency, enabling the production of highly multivalent vaccines incorporating multiple variants of the viral antigen, and improving stability and shelf-life.

The present invention is directed to improved methods of Enterovirus inactivation by formaldehyde in presence of tromethamine buffer resulting in maximum recovery of D-antigen. Subsequent adsorption of said sIPV on aluminium hydroxide provides significantly dose reduced sIPV compositions.

The present disclosure generally relates to hepadnavirus core antigens in which one or more endogenous b cell epitopes have been effectively removed. More specifically, the present disclosure relates to rodent hepadnavirus cores modified to diminish the antibody response to the core so as to enhance the antibody response to heterologous polypeptides included therein.

Vaccine combinations which comprise at least two or more of the following antigens: DTap-HEV-HepB-HPV suitable for administration in humans. A number of variations in the combination of these antigens have been disclosed that is suitable for concomitant administration. The methods of preparing the vaccine combinations are disclosed. Nucleic acids encoding the antigens, as well as methods for their production and use are provided.