Agile methods have been popular in the software industry particularly in relation to technical innovations. However, agility in terms of providing health information support within a crisis laden pandemic situation such as COVID-19 is less well understood. This paper focused on an ongoing response of design, development, and implementation of a COVID-19 surveillance system based on DHIS2 platform in Sri Lanka. Our analysis aims at understanding; and developing agility.An interpretive case study approach was adopted where qualitative data were gathered using multiple methods such as participant observation, document analysis, historical accounts, informal interviews and using secondary data. Thematic analysis technique was adopted where themes were identified collectively following multiple iterations of collaborative analysis.We argue that the flexibility of the software platform, good technical and medical capacity and new modes of collaboration on systems development across institutional borders have contributed to the agility shown in the Sri Lankan context and its success in meeting health information challenges posed by COVID-19.