The present invention relates i.a. to EHV vector’s comprising at least one (at least two) exogenous antigen encoding sequence relating to a pathogen infecting food producing animals, said exogenous antigen encoding sequence is inserted into an insertion site (preferably ORF70) and said exogenous antigen encoding sequence is operably linked to a promoter sequence (preferably promoter sequence comprising 4pgG600 (SEQ ID NO:1) or 4pMCP600 (SEQ ID NO:2) or the complementary nucleotide sequences thereof or a functional fragment or a functional derivative thereof or the complementary nucleotide sequences thereof). Furthermore, the present invention relates to methods for immunizing a food producing animal comprising administering to such food producing animal an immunogenic composition of the present invention. Moreover, the present invention relates to methods for the treatment or prophylaxis of clinical signs caused by swine influenza virus in a food producing animal of need.本發明係關於包括至少一個(至少兩個)與感染產食動物之病原體相關之外源性抗原編碼序列之EHV載體，該外源性抗原編碼序列插入插入位點(較佳地ORF70)中且該外源性抗原編碼序列可操作地連接至啟動子序列(啟動子序列較佳包括4pgG600 (SEQ ID NO:1)或4pMCP600 (SEQ ID NO:2)或其互補核苷酸序列或其功能片段或功能衍生物或其互補核苷酸序列)。另外，本發明係關於對產食動物實施免疫之方法，其包括向該產食動物投與本發明之免疫原性組合物。此外，本發明係關於治療或預防有需要之產食動物由豬流感病毒引起之臨床徵象之方法。
