Evolving based on feedback
Exposure Notifications became available to public health agencies in May to build apps on both Android phones and iPhones. It was built on feedback resulting from more than one hundred technical briefings with state public health officers, state epidemiologists, and where appropriate, their commissioned app developers. Major public health organizations that have been consulted include the Centers for Disease Control and Prevention, the CDC Foundation, the Association of Public Health Laboratories, the American Public Health Association, the Association of State and Territorial Health Officials, the Council of State and Territorial Epidemiologists, the National Association of County and City Health Officials, and the Task Force for Global Health.
In July, based on feedback, we published some updates to ENS including the reference verification server, implementation code, and telemetry design. Since then, U.S. public health authorities that have not yet designed their own apps and want more support in launching an app can use Exposure Notifications Express. This reduces the time it takes public health authorities to develop an app by simply providing Google and Apple with a configuration file, which is then used to provide exposure notifications. Many of these apps in the United States work together so that if you travel across state lines you can still get exposure notifications. The Association of Public Health Laboratories made this possible by hosting a national key server and they offer a list of interoperable U.S. apps. We want to be flexible and support whatever approach works best on a country by country level.
The goal of this project is to assist public health authorities in their efforts by enabling exposure notification in a privacy-preserving manner. We will continue to work with them to help you protect yourself and your community during this pandemic and we plan to keep you updated here with new information again next year.