The FCT project DSAIPA/AI/0122/2020 AIMHealth – AI-based Mobile Applications for Public Health Response, is being promoted by the Information Sciences, Technologies and Architecture Research Center (ISTAR-Iscte), in collaboration with the Center for Psychological Research and Social Intervention (CIS-Iscte), both from Iscte – University Institute of Lisbon, and as well with the Institute of Telecommunications (IT), the Association for Research and Development of the Faculty of Medicine of the University of Lisbon (AIDFM) and the Cardiovascular Center of the University of Lisbon (CCUL). This project is funded by the Foundation for Science and Technology (FCT), according to the FCT contract DSAIPA/AI/0122/2020 under the contest “AI 4 COVID-19: Data Science and Artificial Intelligence in the Public Administration to strengthen the fight against COVID-19 and future pandemics – 2020″. Framework Due to the COVID-19 pandemic, personal contacts were limited, and new solutions had to be developed to prevent the spread of the virus. Some of the technological solutions presented were contact tracing applications, which inform users and authorities about the potential or current risk of spreading the virus. However, among its users, this approach has raised concerns about security and privacy. Objective Encompassing such concerns, this project proposes the creation and availability of a smartphone application and a safe and reliable service distribution platform based on Blockchain and Artificial Intelligence technologies, to identify symptomatic and asymptomatic patients as well as the risk exposure, providing a preventive approach to Public Health strategies.