The present invention relates to the field of (vector) vaccines, and especially to the novel EHV insertion site ORF70. The present invention further concerns related expression cassettes and vectors, which are suitable to express genes of interest, especially antigen encoding sequences. The viral vectors of the present invention are useful for producing an immunogenic composition or vaccine.

Methods for producing virus particles and viral antigens with simplified glycosylation profiles, such as mono-glycosylated forms of HIV, HCV, Dengue virus, West Nile virus and influenza virus. When used as targets for vaccine production, the conserved nature of such sites generate vaccines that are less sensitive to viral mutations. Such methods may include the use of glycosylation inhibitors for production of viruses or viral antigens with simplified glycosylation profiles.

The present inventors discovered that antibodies having weaker antigen-binding activity at the early endosomal pH in comparison with that at the pH of plasma are capable of binding to multiple antigen molecules with a single antibody molecule, have long half-lives in plasma, and have improved durations of time in which they can bind to antigen.

The invention provides a composition useful to prepare high titer influenza viruses, e.g., in the absence of helper virus, which includes internal genes from an influenza virus vaccine strain or isolate, e.g., one that is safe in humans, for instance, one that does not result in significant disease, that confer enhanced growth in cells in culture, such as MDCK cells, or in eggs.

The present inventors discovered that antibodies having weaker antigen-binding activity at the early endosomal pH in comparison with that at the pH of plasma are capable of binding to multiple antigen molecules with a single antibody molecule, have long half-lives in plasma, and have improved durations of time in which they can bind to antigen.

Influenza vaccines are administered using solid-biodegradable microneedles. The microneedles are fabricated from the influenza vaccine in combination with solid excipient(s) and, after penetrating the skin, they dissolve in situ and release the vaccine to the immune system. The influenza vaccine is (i) a purified influenza virus surface antigen vaccine, rather than a live vaccine or a whole-virus or split inactivated vaccine (ii) an influenza vaccine prepared from viruses grown in cell culture, not eggs, (iii) a monovalent influenza vaccine e.g. for immunising against a pandemic strain, (iv) a bivalent vaccine, (v) a tetravalent or >valent vaccine, (vi) a mercury-free vaccine, or (vii) a gelatin free vaccine.

The present invention relates to methods and compositions for stimulating an immune response. In particular, the present invention relates to immunostimulatory RNA molecules comprising sequences derived from an Influenza A virus nucleoprotein-encoding RNA molecule that act as adjuvants and/or immunostimulatory agents to enhance host immune responses.

The present invention provides new compositions and methods for preventing and treating pathogen infection. In particular, the present invention provides compounds having an anchoring domain that anchors the compound to the surface of a target cell, and a therapeutic domain that can act extracellularly to prevent infection of a target cell by a pathogen, such as a virus. The present invention also comprises therapeutic compositions having sialidase activity, including protein-based compounds having sialidase catalytic domains. Compounds of the invention can be used for treating or preventing pathogen infection, and for treating and reducing allergic and inflammatory responses. The invention also provides compositions and methods for enhancing transduction of target cells by recombinant viruses. Such compositions and methods can be used in gene therapy.

Influenza vaccines are administered using solid biodegradable microneedles. The microneedles are fabricated from the influenza vaccine in combination with solid excipient(s) and, after penetrating the skin, they dissolve in situ and release the vaccine to the immune system. The influenza vaccine is (i) a purified influenza virus surface antigen vaccine, rather than a live vaccine or a whole-virus or split inactivated vaccine (ii) an influenza vaccine prepared from viruses grown in cell culture, not eggs, (iii) a monovalent influenza vaccine e.g. for immunizing against a pandemic strain, (iv) a bivalent vaccine, (v) a tetravalent or >4-valent vaccine, (vi) a mercury-free vaccine, or (vii) a gelatin-free vaccine.

Provided herein are polypeptides comprising portions of the influenza virus hemagglutinin, compositions comprising such polypeptides that can be used as immunogens in vaccines and methods of their use to generate an immune response against multiple influenza subtypes in a subject.