The present invention provides compositions and methods of use comprising a chimeric dengue virus E glycoprotein comprising a dengue virus E glycoprotein backbone, which comprises amino acid substitutions that introduce a dengue virus E glycoprotein epitope from a dengue virus serotype that is different from the dengue virus serotype of the dengue virus E glycoprotein backbone.

The invention provides a recombinant polypeptide comprising the EDIII domain of each of Dengue virus serotype DENV-1, DENV-2, DENV-3, and DENV-4 linked to the N-terminal of HBsAg.

The invention relates to a method for preventing dengue disease and hepatitis A in a subject or subject population by simultaneously administering a unit dose of a dengue vaccine composition and a hepatitis A vaccine on the same day. The unit dose of a dengue vaccine composition includes constructs of each dengue serotype, such as TDV-1, TDV-2, TDV-3 and TDV-4, at various concentrations in order to improve protection from dengue infection.

The present invention relates to a lentiviral vector-based Japanese encephalitis (JE) immunogenic composition. The present invention is directed to a recombinant lentiviral vector expressing the precursor of membrane (prM) and the envelope (E) protein, in particular glycoprotein of a Japanese encephalitis virus (JEV) or immunogenic fragments thereof. The present invention also provides cells expressing the lentiviral vector, uses and methods to prevent a JEV infection in a mammalian host, especially in a human or an animal host, in particular a pig or a piglet, preferably a domestic pig or a domestic piglet.

Described is a construct comprising (a) a targeting moiety; (b) a fusogenic moiety consisting one or more fusogenic sequence(s) derived from dengue virus glycoprotein E comprising the sequence DRGWGNGCGLFGKGGI (SEQ ID NO:1) or a sequence which shows 1 to 8 substitutions, deletions, or insertions in comparison to SEQ ID NO:1; and (c) a molecule which is to be delivered into the cytoplasm of a cell. Moreover, described is a pharmaceutical composition comprising the construct according to the invention and optionally a pharmaceutical acceptable carrier. Further, described is a kit comprising one or more fusogenic sequence(s) derived from dengue virus glycoprotein E comprising the sequence as shown in SEQ ID NO:1 or a sequence which shows 1 to 8 substitutions, deletions, or insertions in comparison to SEQ ID NO:1. Further, described is the use of one or more fusogenic sequence(s) derived from dengue virus glycoprotein E for use in delivery of a therapeutic moiety, a detectable moiety, a nucleic acid molecule, preferably an siRNA, a carrier molecule, preferably a nanoparticle, a liposome and a viral vector into the cytoplasm of a cell.

The invention relates to a unit dose of a dengue vaccine composition and methods and uses for preventing dengue disease and methods for stimulating an immune response to all four dengue virus serotypes in a subject or subject population. The unit dose of a dengue vaccine composition includes constructs of each dengue serotype, such as TDV-1, TDV-2, TDV-3 and TDV-4, at various concentrations in order to improve protection from dengue infection.

The present invention is within the Molecular Biology and Biochemistry and Biotechnology fields. More specifically, the present invention describes a process for producing the recombinant fragment of the c-terminal region of the flavivirus NS1 non-structural soluble protein and the recombinant protein (Zv-ΔNS1) in large scale. The product of the invention has advantageous characteristics as a result of the process for obtaining the same, notably regarding folding and the immunological characteristics suitable for the development of serological tests to detect Zika virus. There are also described a purification process, its use and a method of detecting interaction, and a method of diagnosing diseases caused by a flavivirus.

Disclosed are lateral flow assay methods, lateral flow assay test strips, and devices for detection of antibody classes associated with acute immune responses. The invention generally relates to assay methods, in particular, lateral flow assay methods for detection of an antibody isotype associated with acute infection, and to lateral flow assay strips for use in the methods of the invention.

Proteases of Group IV (+)ssRNA viruses were found to act on a human sequences in addition to the viral sequences. The identity of the cleavable human sequences is disclosed. Detection of these sequences can act as a diagnostic of infection. It is contemplated that these findings could be employed to facilitate post-translational silencing at the level of protein (e.g., removal of existing proteins), thus serving as a protein analog to CRISPR/Cas9 and RNAi/RISC, and further to enable sequence-specific silencing of host functions without the modification of the host genome.

A Dengue virus Envelope Dimer Epitope (EDE) wherein the EDE: c) spans the polypeptides of a Dengue virus Envelope polypeptide dimer; and/or d) is presented on a dimer of Envelope proteins; and/or c) is formed from consecutive or non-consecutive residues of the envelope polypeptide dimer, wherein the dimer is a homodimer or heterodimer of native and/or mutant envelope polypeptides, from any one or two of DENV-1, DENV-2, DENV-3 and DENV-4. The EDE may be a stabilized recombinant dengue virus envelope glycoprotein E ectodomain (sE) dimer, wherein the dimer is: covalently stabilized with at least one disulphide inter-chain bond between the two sE monomers, and/or covalently stabilized with at least one sulfhydryl-reactive crosslinker between the two sE monomers, and/or covalently stabilized by linking the two sE monomers through modified sugars; and/or, covalently stabilised by being formed as a single polypeptide chain, optionally with a linker region, optionally a Glycine Serine rich linker region, separating the sE sequences, and/or non-covalently stabilized by substituting at least one amino acid residue in the amino acid sequence of at least one sE monomer with at least one bulky side chain amino acid, at the dimer interface or in domain 1 (D1)/domain 3 (D3) linker of each monomer. A compound, for example an antibody or antibody fragment that can neutralise more than one Dengue virus serotype, for example an antibody that can bind to an EDE of the invention.