The focus on privacy is hindering efficacy, but nobody trusts their government (with good reason) to collect location and contact data.
Me, writing for Lifewire:
The idea of using technology to combat the pandemic spread fast. After all, almost everybody carries a smartphone with them whenever they leave the house. Back at the beginning of the pandemic, the main concern was privacy—what else might our governments do with all that data once they had gathered it? But the real problem, it turns out, is that COVID-19 tracking apps just aren’t that useful.