This project titled “Immunochain: A traceability solution for vaccines in immunization programs” addresses the problem of traceability of immunization vaccines from regional centres, through the distribution mechanisms in cold storage networks and the vaccine handling/administration facilities, till the end consumer in the Indian context. The project, Immunochain, is a big data and blockchain technologies powered, mobile/web-enabled vaccine traceability solution for immunization programs in India. It is vendor-neutral, scalable, replicable and reusable across different immunization programs in any geographical context