Explore the intersection of blockchain technology and contact tracing in this 21-minute conference talk. Delve into how distributed ledger systems can be applied to enhance privacy and security in pandemic response efforts. Gain insights into the potential benefits and challenges of using blockchain for contact tracing, including data integrity, decentralization, and user consent. Examine real-world applications and case studies that demonstrate the practical implementation of blockchain-based contact tracing solutions. Understand the technical aspects of integrating blockchain with existing public health infrastructure and discuss the ethical considerations surrounding data collection and management in this context.