The World Health Organization (WHO) has published a new guide on digital health investments, titled the Digital implementation investment guide: integrating digital interventions into health systems (DIIG). The guide has been launched to help ensure that digital health investments are effective, sustainable, and equitable, and that the implementation is well co-ordinated and appropriate for the local context. This guidebook aims to serve donors and ministries of health who make decisions on digital investments for health. WHO's Chief Scientist Dr Soumya Swaminathan stressed in the foreword of the guide that investment must be carefully and thoughtfully coordinated for equitable access to meet the full range of health needs utilising mature digital public goods, and building on digital development and donor principles to maximise the benefits of digital investments.