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This Master's thesis project focuses on developing a Decentralized Autonomous Organization (DAO) integrated with a blockchain-based vaccination management and recommendation system. The project aims to enhance the security and efficiency of managing vaccination records and recommendations, addressing key issues such as data fragmentation and privacy concerns. This system is designed to foster increased trust, transparency, and community involvement in healthcare decisions.

In the ever-evolving landscape of blockchain technologies the ability to establish and run experiments on different typologies of local networks is a challenge. The project addresses this by introducing a system that allows user to quickly setup and visualize local Proof of Work (PoW) Ethereum (ETH) networks on Raspberry Pis (RPIs). The report introduces the reader to the concept and use case of RPIs, the characteristics of Ethereum blockchains, and the general topic of blockchain technology. It describes the requirements and discusses the design and implementation of the server-client system. The system was evaluated on several runs for grid, star and circle topologies with 3 up to 9 RPIs showcasing the consensus degradation at varying levels of delays.