The International Atomic Energy Agency (IAEA) and the World Health Organization (WHO) co-ordinate a network of Secondary Standards Dosimetry Laboratories (SSDLs), designated by IAEA Member States. The IAEA's Dosimetry Laboratory operates as the central laboratory in the SSDL Network and provides calibrations, reference irradiations, comparison programmes and dosimetry audit services for Member States. The aim of the SSDL Network is to improve accuracy in radiation measurements for cancer therapy; for many countries, the IAEA/WHO Network is the route for traceability to the SI for national dosimetry standards.

A Scientific Committee of seven international experts, including Dr David Burns as representative of the BIPM, meets biennially to advise the Directors General of the IAEA and the WHO regarding the programme of the IAEA/WHO SSDL Network and the activities of the Dosimetry and Medical Radiation Physics Section. A meeting of the Scientific Committee was held in March 2020 to discuss recommendations for future work, covering issues such as the use of the new accelerator facility, knowledge-transfer opportunities, the streamlining of calibration services, and database management. The recommendations will be published in the SSDL Newsletter later in 2020.