Contact-Tracing apps are meant to help track individuals who have tested positive for COVID-19 and then notify everyone with whom they may have come into contact since they were infected. The German government announced that instead of continuing to pursue a centralized approach, it will shift to a more privacy-preserving, decentralized approach. Such apps will only be effective, experts warn, if countries have robust blood-testing programs, teams of manual contact tracers and sufficient levels of personal protective equipment for front-line workers.”]
Source: https://www.govinfosecurity.com/contact-tracing-app-privacy-apple-google-refuse-to-budge-a-14186