https://www.sciencedaily.com/releases/2020/06/200608192334.htm

Information sciences professor Masooda Bashir and doctoral student Tanusree Sharma at the University of Illinois at Urbana-Champaign analyzed 50 COVID-19-related apps available in the Google Play store for their access to users' personal data and their privacy protections. Bashir and Sharma found that most of the apps required access to users' personal data, but only a handful indicated the data would be anonymous, encrypted and secured.

They report their findings in the journal Nature Medicine.