Commentary: COVID-19 contact tracing apps: Choose the technology wisely

There has been significant interest in leveraging smartphone apps for contact tracing, a public health strategy that involves tracking people who are COVID-19 positive to identify disease hot spots. Traditionally this is done by workers on foot and over the telephone, and we know this labor-intensive method works — it has helped in the elimination of smallpox and in curbing the spread of sexually transmitted infections. However, the efficacy of the app-boosted method is still unknown.