Immunogen sequence: MAQFGGQKNP PWATQFTATA VSQPAALGVQ QPSLLGASPT IYTQQTALAA AGLTTQTPAN YQLTQTAALQ QQAAAAAAAL QQQYSQPQQA LYSVQQQLQQ PQQTLLTQPA VALPTSLSLS TPQPTAQITV SYPTPRSSQQ QTQPQKQRVF TGVVTKLHDT FGFVDEDVFF QLSAVKGKTP QVGDRVLVEA TYNPNMPFKW; Positive Samp