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Calibrate your diagnostics with WHO International Standards trusted by laboratories worldwide


The World Health Organization (WHO) international standards provide the highest order of calibration, supporting assay validation, method verification and long term quality assurance in diagnostic laboratories.


We produce over 90% of the WHO international standards in use around the world, as part of the broad portfolio of the National Institute for Biological Standards and Control (NIBSC) reference materials.


Clinical laboratories operating under ISO 15189 rely on accuracy, traceability and comparability. Our WHO standards for Nucleic Acid Amplification Techniques (NAT) underpin global harmonisation of infectious disease testing, ensuring results remain reliable over time and across pipelines.


Why Choose Our Standards


• Assay calibration and sensitivity assessment


• Supports ISO 15189 and IVDR traceability


• Trusted by diagnostic laboratories worldwide


Our range of WHO international standards covers blood-borne diseases, transplant management, STI testing, and respiratory pathogens. Examples include:


4th 5th 6th


WHO IS for HIV-1 RNA for NAT, 16/194 WHO IS for Hepatitis B DNA for NAT, 22/120 WHO IS for Hepatitis C, RNA for NAT, 18/184


Explore our Catalogue Scan or visit www.nibsc.org to view our full catalogue


Contact Us


Email us at diagidm@mhra.gov.uk with your questions about our reference materials or to discuss your lab’s current and future needs.


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