Apple and Google are releasing their much-anticipated “exposure notification” technology to help global health authorities track the coronavirus pandemic. Governments around the world can now use the technology in their own contact tracing apps, subject to approval by the two tech giants.
Contact tracing—tracking down those who may have been exposed to an infectious person—is an important and proven strategy that scientists have used to successfully fight outbreaks ranging from Ebola to HIV. In the last few months, many countries have been working to use various technologies, including mobile phone apps, to try to keep up with the scale and
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