The AccuPlex™ SARS-CoV-2, Flu A/B and RSV Reference Material Kit is formulated for use with multiplex test methods that can detect SARS-CoV-2, flu A/B and respiratory syncytial virus (RSV). Included are positive reference material directed against SARS-CoV-2, Flu A/B and RSV, as well as negative reference material directed against the human RNase P gene. It is designed to measure day-to-day performance of the assay, providing both a positive and a negative reference solution. Product is released using the US CDC Influenza SARS-CoV-2 (Flu-SC2) Multiplex Assay and Cepheid GeneXpert Xpress SARS-CoV-2 and Flu/RSV Assays.