North Carolina' s cell phone app contact tracing SlowCOVIDNC is shown on Friday, Dec. 4, 2020, in Charlotte, N.C. An analysis shows that few Americans are utilizing contact tracing technology launched in a host of U.S. states and territories. (AP Photo/Chris Carlson)

COVID-19 notification apps for North Carolina, SlowCOVIDNC and Virginia, COVIDWISE are shown on a smart phone Friday, Dec. 4, 2020 in Raleigh, N.C. Six months ago, Apple and Google introduced a new smartphone tool designed to notify people who might have been exposed to the coronavirus, without disclosing any personal information. But for the most part, Americans haven't been all that interested. (AP Photo/Gerry Broome)

North Carolina' s cell phone app contact tracing SlowCOVIDNC is shown on Friday, Dec. 4, 2020, in Charlotte, N.C. An analysis shows that few Americans are utilizing contact tracing technology launched in a host of U.S. states and territories. (AP Photo/Chris Carlson)