Operational requirements for implementing WHO recommendations in digital systems. 2nd edition. To ensure that countries can effectively benefit from digital health investments, “digital adaptation kits” (DAKs) are designed to facilitate the accurate reflection of WHO’s clinical, public health and data use guidelines in the digital systems that countries are adopting. DAKs are operational, software-neutral, standardized documentations that distil clinical, public health and data use guidance into a format that can be transparently incorporated into digital systems.