Immunogen sequence: ALEYIPNNAY LHCQIGCCYR AKVFQVMNLR ENGMYGKRKL LELIGHAVAH LKKADEANDN LFRVCSILAS LHALADQYED AEYYFQKEFS KELTPVAKQL LHLRYGNFQL YQMKCEDKAI HHFIEGVKIN QKSREKEKMK DKLQKIAKMR LSKNGADSEA LHVLAFLQEL NEKMQQADED SERGLESGSL IPSASSWNGE; Positive Samp