Privacy-respecting contact tracing is a well-established concept, backed by a large volume of research data as far back as 2013. As of April 7, 2020, more than a dozen expert groups were working on privacy-respecting solutions, using in particular Bluetooth Low Energy (BLE) technology to record the proximity of a user to other mobile phones.
Utafutaji wa watu waliotangamana ambao faragha yake imehifadhiwa ni dhana iliyooanzishwa vizuri, na kikundi kibwa kilichoanziwa zamani mwaka wa 2013. Hadi tarehe 7 Aprili 2020, vikundi vingi vya wataalamu kadhaa walikuwa wakishughulikia suluhisho za faragha ambazo ni rahisi kutumia, kama vile Bluetooth Low Energy (BLE) ya kuweka eneo la karibu la mtumiaji kwa simu zingine.