ARPA-H’s Delphi program aims to create a reusable ecosystem for continuous monitoring of biological signals beyond heart rate and blood glucose. Its approach uses small, modular “chiplets” that can be combined for different sensing functions in wearable or ingestible devices. The program targets markers such as hormones, inflammatory signals, and medication levels, with goals that include secure monitoring and interoperability across sensor platforms. ARPA-H says selected teams are developing prototypes for several use cases, including heart-failure biomarkers, inflammation, and perimenopause-related monitoring.