The fourth industrial revolution (Industry 4.0) has prompted new and innovative solutions that are reliant on Artificial Intelligence (AI) and contemporary technological advancements. Secure, intelligent, and on-demand healthcare services for patients is one of the core pillars of Industry 4.0. Patient medical data security and privacy is a crucial part of electronic healthcare systems. Disease diagnosis and treatment are highly dependent on the authenticity and security of patient data, both when stored and communicated. Blockchain technology plays a vital role in transaction authentication and secure decentralized immutable data storage. In this project, we present an interactive healthcare information system that enables COVID-19 contact tracing and vaccine certificate validation for users. The solution uses a blockchain technique to validate the certificates.