The NATFRC-ERC from ZeptoMetrix is a third-party molecular quality control that allows laboratories to monitor the continued performance of their multiplexed respiratory assays. As an easy-to-use, refrigerated, inactivated whole organism control, it is designed to quickly and safely assure that testing instruments are providing accurate results. With targeted concentrations of 15,000 cp/mL for all four analytes, NATFRC-ERC can give the laboratory confidence that it is providing accurate test results.