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SummaryNo difference between wild type and RA27/3 strains of rubella virus was revealed by sedimentation or polyacrylamide-gel electrophoresis. Antibodies in post-infection and post-vaccination sera differed in their affinity for wild-type and RA27/3 strains, suggesting an antigenic difference.

Rubella Virus Wild-type and RA27/3 Strains: A Comparison by Polyacrylamide-gel Electrophoresis and Radioimmune Precipitation