Radioimmunoassay for antibodies to rubella virus and its ribonucleoprotein component

IgA and IgG antibodies to the ribonucleoprotein component of rubella virus have been demonstrated by radioimmune precipitation in sera from patients with recent but not remote rubella infection. This observation suggests that a test for antibodies to the ribonucleoprotein component may provide additional evidence in the diagnosis of recent rubella infection.