A material which is used to verify the performance of an assay intended to be used for the qualitative and/or quantitative detection of immunoglobulin G (IgG) and/or immunoglobulin M (IgM) antibodies to organisms in a clinical specimen, as part of an antenatal or newborn infection TORCH screen. The assay is intended to detect infection by multiple organisms that include Toxoplasma gondii, Rubella virus, Cytomegalovirus (CMV), Herpes simplex virus 1 (HSV1), Herpes simplex virus 2 (HSV2), human immunodeficiency virus 1 (HIV1), measles virus and/or Treponema pallidum, and sometimes additional organisms.