The present invention relates to a peptide consisting of 10 to 30 amino acid residues and derived from the amino acid sequence SIPWNLERITPPRYRADEYQPPDGGSLVEV(SEQ ID No. 1), wherein the peptide comprises the amino acid sequence SIPWNLERIT(SEQ ID NO:9), and to a vaccine comprising this peptide.本發明係關於一胜肽,由10至30個胺基酸所組成,且該胜肽係源自於SEQ ID NO:1所示之胺基酸序列-SIPWNLERITPPRYRADEYQPPDGGSLVEV,其中,該胜肽之序列為SIPWNLERIT(SEQ ID NO:9);以及包含該胜肽之疫苗。