Abstract: A vaccine for the selective immunization of horses against EHV4 and/or EHV1 is provided comprising at least one of (i) EHV4 virus wherein a portion of the gG gene of the EHV4 virus that elicits a type-specific response to EHV4 has been deleted and (ii) EHV1 virus wherein a portion of the gG gene of the EHV1 virus that elicits a type-specific response to EHV1 has been deleted. Antibodies which specifically bind to a epitopes of EHV4 gG or EHV1 also are provided.

Abstract: An inactivated dengue virus vaccine to immunize and protect humans against dengue fever is described. The vaccine is based on dengue viruses which have been propagated to high titers in suitable cells, purified and inactivated under conditions which destroy infectivity but preserve immunogenicity, a high level of which is demonstrated in animal models. Uses of the inactivated dengue virus for detecting antibodies to dengue and kits therefor are also described.

Abstract: The invention includes a chimeric virus for use in a vaccine preparation having a genome comprising nucleic acid sequences encoding at least one structural protein from one flavivirus and nucleic acid sequences encoding nonstructural protein from another flavivirus. The genome preferably includes mutations within the viral genome that reduce virus virulence and in a particularly preferred embodiment these vaccines are directed to flaviviruses such as dengue virus, tick-borne encephalitis virus and Japanese encephalitis virus. The invention also includes a baculovirus having a recombinant dengue cDNA sequence which encodes: (1) dengue virus capsid protein, pre-matrix protein, envelope glycoprotein and NS1 and NS2a nonstructural proteins or (2) dengue envelope glycoprotein or (3) dengue non-structural proteins NS1 and NS2a.

Abstract: The present invention is directed to compositions and methods for the induction of immune responses in mammals against enveloped animal viruses. More particularly, the invention provides vaccine compositions containing multiple MHC allotypes. By generating an immune response against these MHC molecules, virus or virus-infected cells expressing foreign MHC molecules can be attacked prior to infection of cells in the immunized host. In some embodiments, the vaccine compositions contain viral antigens and adjuvants as well. The vaccine compositions may comprise intact cells, cell-derived membrane preparations or recombinantly or chemically produced MHC molecules or fragments thereof.