A method for preventing or treating porcine epidemic diarrhea, the method including: administering a live vaccine of a porcine epidemic diarrhea virus and an adjuvant to a pig through oral administration or nasal administration; and administering an inactivated vaccine of the porcine epidemic diarrhea virus and an adjuvant to the pig through intramuscular administration.

In certain embodiments, the disclosure relates to vectors containing bacterial nucleic acid sequences and a paramyxovirus gene. Typically, the expression vector comprises a bacterial artificial chromosome (BAC), and a nucleic acid sequence comprising a respiratory syncytial virus (RSV) gene in operable combination with a regulatory element and optionally a reporter gene.

Provided are modified bacteria and derivatives thereof that express nucleotide sequence encoding an antigen of a viral family selected from the group comprising Retroviridae (e.g., HIV, including a HIV Fusion Peptide antigen), Orthomyxoviridae, Paramyxoviridae, Arenaviridae, 5 Filoviridae, and/or Coronaviridae (e.g., an SARS-CoV, SARS-CoV-2 Fusion Peptide, and/or PEDV). In some embodiments, the bacterium has a reduced genome and induces an enhanced immune response against the viral antigen of interest when administered to a subject. In some embodiments, the viral (e.g., SARS-CoV, 10 SARS-CoV-2, PEDV, and/or HIV) antigen is expressed on a surface of a bacterium. Also provided are method for producing antibodies against viral antigens, vaccine compositions, methods for vaccinating subjects, methods for treating viral infections in subjects, and expression vectors for expressing viral antigens including but not limited to coronavirus (e.g., SARS-CoV, SARS-CoV-2, and/or PEDV) antigens and/or HIV antigens on the surface of reduced 15 genome bacteria.

Provided are modified bacteria and derivatives thereof that express nucleotide sequence encoding an antigen of a viral family selected from the group comprising Retroviridae (e.g., HIV, including a HIV Fusion Peptide antigen), Orthomyxoviridae, Paramyxoviridae, Arenaviridae, 5 Filoviridae, and/or Coronaviridae (e.g., an SARS-CoV, SARS-CoV-2 Fusion Peptide, and/or PEDV). In some embodiments, the bacterium has a reduced genome and induces an enhanced immune response against the viral antigen of interest when administered to a subject. In some embodiments, the viral (e.g., SARS-CoV, 10 SARS-CoV-2, PEDV, and/or HIV) antigen is expressed on a surface of a bacterium. Also provided are method for producing antibodies against viral antigens, vaccine compositions, methods for vaccinating subjects, methods for treating viral infections in subjects, and expression vectors for expressing viral antigens including but not limited to coronavirus (e.g., SARS-CoV, SARS-CoV-2, and/or PEDV) antigens and/or HIV antigens on the surface of reduced 15 genome bacteria.

The invention pertains to a vaccine for use in protecting a pig against an infection with porcine epidemic diarrhea virus (PEDV), the vaccine comprising non-live PEDV antigen and a non-metabolizable oil containing adjuvant, wherein the total amount of oil in the vaccine is less than 50% v/v, by administration of a dose of the antigen corresponding to at least 3.0E6 TCID.sub.50 killed whole PEDV. The invention also pertains to a method of protecting a pig against an infection with porcine epidemic diarrhea virus.

The invention pertains to a vaccine for use in protecting a pig against an infection with porcine epidemic diarrhea virus (PEDV), the vaccine comprising non-live PEDV antigen and a non-metabolizable oil containing adjuvant, wherein the total amount of oil in the vaccine is less than 50% v/v, by administration of a dose of the antigen corresponding to at least 3.0E6 TCID.sub.50 killed whole PEDV. The invention also pertains to a method of protecting a pig against an infection with porcine epidemic diarrhea virus.

Isolated porcine epidemic diarrhea virus (PEDV) deposited under ATCC Accession No. PTA-121847, and attenuated strains generated by serial passage in culture of the deposited strain. Immunogenic compositions for reducing the incidence or severity of clinical symptoms from PEDV infection, and methods of making and using the same.

Isolated porcine epidemic diarrhea virus (PEDV) deposited under ATCC Accession No. PTA-121847, and attenuated strains generated by serial passage in culture of the deposited strain. Immunogenic compositions for reducing the incidence or severity of clinical symptoms from PEDV infection, and methods of making and using the same.

The present disclosure relates to a polymer-coated virus particle for an oral virus vaccine, a method of preparing the same, and a composition comprising the same. In accordance with the present disclosure, the oral virus vaccine can be effectively delivered to the intestines without being destroyed even in the low pH environment of the gastrointestinal tract, then the prevention efficacy against viral infections can be improved.

The present disclosure relates to a polymer-coated virus particle for an oral virus vaccine, a method of preparing the same, and a composition comprising the same. In accordance with the present disclosure, the oral virus vaccine can be effectively delivered to the intestines without being destroyed even in the low pH environment of the gastrointestinal tract, then the prevention efficacy against viral infections can be improved.