The Exposure Notification System or ENS allows public health authorities to develop apps that augment manual contact tracing efforts while preserving the privacy of their citizens. As of today, public health authorities have used ENS to launch in 16 countries and regions across Africa, Asia, Europe, North America and South America, with more apps currently under development.

Apple likely made the change to use Exposure Notification service without the need for a contact tracing app to quietly encourage more public health departments to use its service. Only a handful of states in the United States and a few countries worldwide are using Google and Apple’s mobile technology. Most health departments still use an old fashioned contact tracing method that relies on in-person interviews and phone calls to locate those individuals who came in contact with an infected person.