The present invention relates to a vaccine for protecting a pig against diseases associated with corona virus infection including porcine epidemic diarrhea virus (PEDV) and/or porcine deltacorona virus (PDCoV). The vaccine commonly includes inactivated/killed PEDV (e.g., chemically inactivated PED virus), and/or recombinant PEDV antigen, and/or an adjuvant inactivated/killed PDCoV (e.g., chemically inactivated PDCoV virus), and/or recombinant PDCoV antigen and an adjuvant. Methods for protecting pigs against diseases associated with PEDV and/or PDCoV and methods of producing the porcine epidemic diarrhea virus and/or porcine deltacorona virus vaccine are also provided.

A method of easily producing an immunogenic pupa for oral administration and a pupa for oral administration produced by the method are provided. The method is a method of producing a pupa for oral administration, including a step of infecting a larva or pupa of an insect capable of being baculovirus-infected with a recombinant baculovirus having DNA encoding an antigen protein introduced therein and freeze-drying a pupa having pupated from the infected larva or the infected pupa.

The present invention relates to a vaccine for protecting a pig against diseases associated with corona virus infection including porcine epidemic diarrhea virus (PEDV) and/or porcine deltacorona virus (PDCoV). The vaccine commonly includes inactivated/killed PEDV (e.g., chemically inactivated PED virus), and/or recombinant PEDV antigen, and/or an adjuvant inactivated/killed PDCoV (e.g., chemically inactivated PDCoV virus), and/or recombinant PDCoV antigen and an adjuvant. Methods for protecting pigs against diseases associated with PEDV and/or PDCoV and methods of producing the porcine epidemic diarrhea virus and/or porcine deltacorona virus vaccine are also provided.

The present invention relates to a vaccine for protecting a pig against diseases associated with corona virus infection including porcine epidemic diarrhea virus (PEDV) and/or porcine deltacorona virus (PDCoV). The vaccine commonly includes inactivated/killed PEDV (e.g., chemically inactivated PED virus), and/or recombinant PEDV antigen, and/or an adjuvant inactivated/killed PDCoV (e.g., chemically inactivated PDCoV virus), and/or recombinant PDCoV antigen and an adjuvant. Methods for protecting pigs against diseases associated with PEDV and/or PDCoV and methods of producing the porcine epidemic diarrhea virus and/or porcine deltacorona virus vaccine are also provided.