It is a system feature that was jointly introduced by Apple and Google in April 2020, and was designed to better combat the Neocoronian outbreak, primarily by enabling public ****health authorities to develop apps without to track down New Crown contacts without developing an app.

The difference with our Big Data Communications Trip Card is that Exposure Notification uses a cell phone's Bluetooth capability to keep an all-day log of the cell phone carrier, while Big Data Communications Trip Card uses base station locations for tracking.