For a privacy-preserving alternative, see Pan-European Privacy-Preserving Proximity Tracing (https://www.pepp-pt.org/ https://www.pepp-pt.org/) which was announ

For a privacy-preserving alternative, see Pan-European Privacy-Preserving Proximity Tracing (https://www.pepp-pt.org/ https://www.pepp-pt.org/) which was announced today.