A commentary of Digital contact tracing in MIT Technology Review 2021

In 2020, the COVID-19 pandemic has brought “digital contact tracing” to the forefront of public attention. In the context of COVID-19, technology has offered public health investigators a new capability for locating infected individuals, i.e., digital contact tracing. Through this technology, investigators were able to track the location of patients without relying on their memory, which alleviated disease surveillance pressure. The practical application of this technology is known as “Exposure Notification.” Developers were able to complete the creation and operation of this digital contact tracing system within a few weeks, and they made the code open-source to ensure that Apple and Android users worldwide could utilize it.