The invention relates to a method of increasing the yield of virus, virus particles, or viral vectors from host cells in a bioreactor. The invention provides a reproducible and robust method and system of determining and controlling the optimal time of infection of host cells using a correlation of process air parameters including Air flow, O.sub.2 flow, and respective trends thereof resulting in increased virus yield.

The present invention relates to methods and compositions for enhancing expression from RNA expression vectores. The invention is based upon the observation that reducing the frequency of the dinucleotide CpG and UpA has a significant effect on expression from such vectores. Aspects of the invention include, amongst others, synthetic RNA vectores, virions, cells, methods of producing vaccines and methods of treatment or immunisation.

Disclosed herein are methods of forming compounds and exemplary compounds in the nature of a conjugated compound demonstrating enhanced stability, which in some embodiments comprises a protein and virus particle mixed in a conjugation reaction to form a conjugate mixture, such that the conditions and steps of forming these products allow for unrefrigerated storage for longer time periods than previous approaches, thus making feasible access to such products over a global supply chain.

Disclosed herein are methods of forming compounds and exemplary compounds in the nature of a conjugated compound demonstrating enhanced stability, which in some embodiments comprises a protein and virus particle mixed in a conjugation reaction to form a conjugate mixture, such that the conditions and steps of forming these products allow for unrefrigerated storage for longer time periods than previous approaches, thus making feasible access to such products over a global supply chain.

The present invention relates to a low-serum medium composition for culturing Vero cells, and a method for culturing Vero cells and a method for producing a virus, both using the same.

Disclosed herein are methods and exemplary compositions associated with virus purification, antigen purification, and conjugation of virus and proteins (e.g., antigen) to form vaccines for delivery of immunological and other therapeutic agents, exemplary aspects of which may include harvesting viral and antigenic substances from source organisms; a purification platform comprising chemical separation and size-difference separation for the removal of contaminants, debris and impurities from the viral and protein (e.g. antigenic, including influenza hemagglutinin antigens) substances, as well as their concentration and collection; and a conjugation platform providing activation of the virus at a pH that increases binding rate and binding propensity between the virus and the protein, wherein embodiments related to the conjugation platform include controlling the ratio of virus to protein.

The present invention relates to a method for removing host cell DNA from a sample comprising infectious viral particles and host cell DNA by anion exchange chromatography in the presence of at least one of a non-ionic surfactant, a sugar and a protein and to a method for purifying recombinant infectious viral particles from a host cell culture employing such an anion exchange chromatography step.

The present disclosure relates to separation and purification methods for a vaccine virus using affinity chromatography, and more particularly, to a purification method for a virus capable of obtaining a vaccine virus with a high purity and a high yield using affinity chromatography containing a vaccine virus-affinity resin.

Disclosed herein are methods and exemplary compositions associated with antigen purification, exemplary aspects of which may include harvesting viral and antigenic substances from source organisms; and a purification platform comprising chemical separation and size-difference separation for the removal of contaminants, debris and impurities from the viral and protein (e.g. antigenic, including influenza hemagglutinin antigens) substances, as well as their concentration and collection.

Disclosed herein are methods and exemplary compositions associated with virus purification, antigen purification, and conjugation of virus and proteins (e.g., antigen) to form vaccines for delivery of immunological and other therapeutic agents, exemplary aspects of which may include harvesting viral and antigenic substances from source organisms; a purification platform comprising chemical separation and size-difference separation for the removal of contaminants, debris and impurities from the viral and protein (e.g. antigenic, including influenza hemagglutinin antigens) substances, as well as their concentration and collection; and a conjugation platform providing activation of the virus at a pH that increases binding rate and binding propensity between the virus and the protein, wherein embodiments related to the conjugation platform include controlling the ratio of virus to protein.