Immunogen sequence: VHPQKYAMDV ENKIQEKNVE PNISFDGSIQ CSGKDAILFK LETAEEIHRK NQQDSDLSVK MLKDFLEDDT DVNQYLLPPK SLLRYALLLD IVQPTCRRSV CFTKGYGSYI EGTGSVLQTA EDVQVENIYK SLTNLSQEEQ ITKLLILKLR YFTPKEIANL LGFPPEFGFP EKITVKQRYR LLGNSLNVHV VAKLIKILYE; Positive Samp