The GHS Index is underpinned by the principle that ‘a health threat anywhere is a health threat everywhere,’ an ethos championed by the architects of the GHSA.32 We believe that data describing national health security capacities should be a public good. In this spirit, we anchored the GHS Index in publicly available data and made the tool itself—and all its data—freely available. To ensure alignment with the JEE and integration of all publicly available information shared by countries, the GHS Index also draws heavily from WHO’s repository of publicly available JEE reports. Moving forward, we strongly encourage all countries to document relevant capacities publicly—both in the interest of global cooperation and transparency, and to improve the fidelity of future monitoring efforts.