00/410 - MAPREC assay of poliovirus type 1 (Sabin).100% 480-A, 525-C DNA(1st International Reference Preparation) 00/416 - MAPREC assay of poliovirus type 1 (Sabin) Low Mutant Virus Reference(1st International Reference Preparation) 00/418 - MAPRECassay of poliovirus type 1 (Sabin) (1st International Standard)