This product contains inactivated inftuenza B and respiratory syncytial virus in storage buffer. The product is to be used as a positive test sample in commercially-available clinical antigen and polymerase chain reaction (PCR) test kits, and in non-commercial clinical laboratory tests for the detection of influenza B antigens. The product is to be used for immunoassay and nucleic acid test instrument (device verification/validation, manufacturing QMS, educational and R&D purposes.