![]() He opens up his Android phone, verifies his diagnosis using documentation from a healthcare provider, and taps a button that uploads his identifier beacon to a centralized cloud server. A week later, Ryan comes down with COVID-19 symptoms, sees a doctor, and is diagnosed with COVID-19.Their phones know they've been in contact and store that information on the device itself, transmitting it nowhere else. During this time, each of their phones is transmitting entirely anonymous identifier beacons, and picking up the identifier beacons transmitted by the other person. There's a long wait, so Eric and Ryan are standing in the checkout line together for approximately 10 minutes.Eric has an iPhone and Ryan has an Android phone, both with a health app that uses the exposure tracking API or the Express Exposure Notification feature. ![]() Two people, Ryan and Eric, are both at the same grocery store shopping for food on a Tuesday afternoon.Here's a detailed, step-by-step walkthrough on how it works: Exposure notification has a self-explanatory name, and in a nutshell, the feature was designed to send you a notification if you've been in proximity to a person who is diagnosed with COVID-19. How Exposure Notification WorksĪlmost everyone has a smartphone, which makes them ideal for determining who you've come in contact with. The APIs were created with privacy and security in mind, and app usage is opt-in rather than mandatory. Apple and Google also implemented an "Express" feature that allows Exposure Notifications to work in partnership with health authorities, but without an Exposure Notification app. ![]() Instead, the technology was incorporated into apps designed by public health authorities worldwide, which can use the tracking information to send notifications on exposure and follow up with recommended next steps. ![]() With the expiration of the COVID-19 national state of emergency in the United States on May 11, 2023, the system is no longer functional in most of the over 30 states that had adopted the system.Įxposure Notification started out as contact tracing, an Apple-Google initiative that was announced in early April 2020 to limit the spread of COVID-19.Īpple and Google created an API that is designed to allow iPhones and Android smartphones to interface with one another for contact tracing purposes, so if and when you happen to be nearby someone who is later diagnosed with COVID-19, you can get a notification and take the appropriate steps to self isolate and get medical help if necessary.ĭetermining whether you've come into contact with someone relies on your iPhone, which, using the exposure notification API, interacts with other iPhones and Android smartphones over Bluetooth whenever you're around someone else who also owns a smartphone, exchanging anonymous identifiers.Īpple and Google developed the underlying APIs and Bluetooth functionality, but they did not develop the apps that use those APIs. Apple in May 2020 introduced an Exposure Notification System, which was designed to let public health authorities and governments worldwide help people figure out if they've been exposed to COVID-19, and if so, what steps to take next to minimize the spread of the virus.Īs the pandemic has waned, various governmental agencies have been gradually shutting down their Exposure Notification systems.
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