title: Loophole in rubella screening: a factor blocking radial hemolysis.
mesh_terms: D000914:Antibodies, Viral / Q000032:analysis; D005188:False Negative Reactions; D006462:Hemolytic Plaque Technique; D006801:Humans; D012409:Rubella / Q000175:diagnosis*; D012412:Rubella virus / Q000276:immunology
chemical_list: D000914:Antibodies, Viral