![]() ![]() That is the US Centers for Disease Control and Prevention guideline for the conditions that are most likely to allow viral transmission and the period of time that an infected person is considered contagious. Each phone uses constantly changing secret codes to keep a log of phones that spent more than a cumulative 15 minutes within six feet of it over the previous 14 days. The app runs in the background with Bluetooth Low Energy technology that continually pings nearby enabled phones without excessively draining batteries. When Ken Wottge was alerted that he had been exposed to COVID-19, he dropped everything and went for a test. Select United States and California.Īndroid phones require users to download the free app from the Google Play store it too will operate on phones made since 2014. To opt in on those iPhones, users can go to Settings, then Exposure Notifications, then Turn on Exposure Notifications. All rely on the same Exposure Notifications Express system from Apple/Google.Īpple software updates last year embedded the technology in all iPhones made since 2014. With new infections down more than 90% in the state since the December peak, and built-in privacy protections that make outcomes analysis challenging, the data might not be published until the pandemic is nearly over, he said.ĬA Notify is a simple application that is also being used in nine other states and the District of Columbia. He has been impressed by anecdotal data from the pilot, including a feature that enables users to share stories, as well as experience in other countries like the UK. ![]() Christopher Longhurst, the chief information officer for UC San Diego Health, who led the pilot there and oversees the health system’s current contract to manage parts of the statewide operation. “I think that when the data comes out it will show that unquestionably it helped,” said Dr. ![]() Precisely how many is an open question.ĬA Notify is a simple application that is also being used in nine other states and the District of Columbia. Since the launch, it has almost certainly prevented some infections, according to preliminary studies of similar technology used elsewhere. He is director of information security at UC San Diego Health but was not directly involved with the pilot. Wottge had installed the app three months earlier, when a pilot began for students and employees at UC San Diego and UC San Francisco. It provides an alert if the phone’s user has been exposed to an infectious person who had also enabled the app on his or her phone. The app employs a framework released jointly by Apple and Google, and uses specifications set by the state departments of public health and technology. “It answered all my questions,” he said.Ĭalifornia launched the exposure notification app, called CA Notify, statewide on December 10. There was other information on the notification website too. He changed plans and got tested that afternoon the test was negative. “I was going to run a few errands,” said Wottge, 56. This is kind of cool.’ The second was ‘OK, and what does that mean? What do I have to do?’” He clicked the link and found out that COVID tests were most accurate if taken three to seven days after exposure. It said the exposure had happened five days earlier. ![]() One day in December, Ken Wottge was working from his San Diego home around noon when the notification popped up on his iPhone: Possible exposure to COVID-19 virus. Ken Wottge of San Diego was notified by a smartphone app that he may have been exposed to the virus that causes COVID-19. ![]()
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