The disclosure relates to respiratory syncytial vims (RSV) ribonucleic acid (RNA) vaccines, as well as methods of using the vaccines and compositions comprising the vaccines.

The disclosure describes compositions containing PEGylated compounds using linkers, bivalent polysaccharide covalent PEG compounds, and methods of bivalent polysaccharide-PEG compounds in the development of multivalent vaccines. PEGylated conjugation of capsular polysaccharides to carrier proteins is carried out using homo-bifunctional and/or hetero-bifunctional linkers of specific lengths. Incorporation of bifunctional PEG linkers induces higher titers of functional antibodies with high avidity, eliciting higher immunologic memory, and reduced carrier protein effect. This provides immunochemically cross-reactive capsular polysaccharides wherein one or more cross-reactive capsular polysaccharides are covalently PEG compounded sequentially or concurrently to carrier protein using bifunctional linkers bearing the same or different functional groups. Such a linker and the size of the capsular polysaccharides provides an effective multivalent vaccine with high antibody titers and a reduced carrier effect, with a reduction in the content of the capsular polysaccharide and protein per dose of vaccine which reduces reactogenicity.

The present invention relates to a carrier protein with site-directed mutation and use thereof in preparation of a vaccine, wherein the carrier protein is selected from fusion proteins formed by one, two or more of diphtheria toxoid, a non-toxic mutant of diphtheria toxin, a bacterial outer membrane protein and a bacterially expressed protein, wherein an amino acid at at least one site on the carrier protein is mutated into an unnatural amino acid, and the unnatural amino acid contains an azido or alkynyl terminal group. In a mutual reaction process of the carrier protein with site-directed mutation of the present invention and a polysaccharide antigen, a covalent bond is formed, and meanwhile a formed conjugate is in a bead-string state, so that the carrier protein and the polysaccharide antigen can be effectively prevented from being excessively crosslinked. Further, particle size distribution of the conjugate is significantly uniform and controllable, which provides an effective means for improving quality of a polysaccharide-protein conjugate vaccine.

Disclosed herein are compositions, uses, and methods for treatment of prostate cancers. In one aspect, disclosed herein is a composition or medical preparation comprising at least one RNA, wherein the at least one RNA encodes the following amino acid sequences: (i) an amino acid sequence comprising Kallikrein-2 (KLK2), an immunogenic variant thereof, or an immunogenic fragment of the KLK2 or the immunogenic variant thereof; (ii) an amino acid sequence comprising Prostate Specific Antigen (PSA), an immunogenic variant thereof, or an immunogenic fragment of the PSA or the immunogenic variant thereof; (iii) an amino acid sequence comprising Prostatic Acid Phosphatase (PAP), an immunogenic variant thereof, or an immunogenic fragment of the PAP or the immunogenic variant thereof; (iv) an amino acid sequence comprising Homeobox B13 (HOXB13), an immunogenic variant thereof, or an immunogenic fragment of the HOXB13 or the immunogenic variant thereof; and (v) an amino acid sequence comprising NK3 Homeobox 1 (NKX3-1), an immunogenic variant thereof, or an immunogenic fragment of the NKX3-1 or the immunogenic variant thereof.

The present invention relates to nucleic acid constructs capable of encoding antigenic peptides or polypeptides derived from multiple Human Papilloma Virus (HPV) early proteins, and to immunogenic compositions comprising such nucleic acid constructs and a pharmaceutically acceptable carrier. Such nucleic acid constructs and immunogenic compositions are useful in the treatment of persistent HPV infection and low-grade HPV lesions, particularly infections and lesions of human anogenital epithelial tissue, such as cervical epithelia.

Disclosed herein are compositions comprising optimized consensus TERT antigens and methods for treating cancer and in particular immunogenic compositions that treat and provide protection against tumor.

Antigenic molecules and compositions described herein protect against infection by typhoidal and non-typhoidal Salmonella serovars. Methods of immunization comprise the use of the antigenic molecules.

The disclosure describes respiratory syncytial virus (RSV) ribonucleic acid (RNA) vaccines, as well as methods of using the vaccines and compositions comprising the vaccines.

Provided is a seasonal influenza vaccine having a higher efficacy than a split vaccine. A seasonal influenza vaccine which induces virus-specific antibodies in the nasal mucosa, comprises inactivated whole influenza virus particles as an active ingredient, and is to be administered intradermally at dose per administration of 15 μg HA or more per strain as antigen.

The present invention provides capsular polysaccharides from Streptococcus pneumoniae serotypes identified using NMR. The present invention further provides polysaccharide-protein conjugates in which capsular polysaccharides from one or more of these serotypes are conjugated to a carrier protein such as CRM197. Polysaccharide-protein conjugates from one or more of these serotypes may be included in multivalent pneumococcal conjugate vaccines having polysaccharides from multiple additional Streptococcus pneumoniae serotypes.