Next Monday, Ireland is due to begin its slow emergence from beneath the shadow of COVID-19. The first of a five phase process is set to see the reopening of building sites, shutters lifted on certain shops, and the return of some socially-distanced sport.
Each phase is set to take three weeks, and within those three weeks, the National Public Health Emergency Team (NPHET), led by Dr Tony Holohan, will be trying to understand how the spread of the disease changes.
It will then advise government. For that, they need data. The WHO says it should be "real-time, accurate data on the testing of suspected cases, the nature and isolation status of all confirmed cases, the number of contacts per case and completeness of tracing".