Published on in Vol 8, No 6 (2020): June
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/20369, first published
.
![Case-Initiated COVID-19 Contact Tracing Using Anonymous Notifications Case-Initiated COVID-19 Contact Tracing Using Anonymous Notifications](https://asset.jmir.pub/assets/9e71ffb4a8a70908c256c254e7fdc080.png 480w,https://asset.jmir.pub/assets/9e71ffb4a8a70908c256c254e7fdc080.png 960w,https://asset.jmir.pub/assets/9e71ffb4a8a70908c256c254e7fdc080.png 1920w,https://asset.jmir.pub/assets/9e71ffb4a8a70908c256c254e7fdc080.png 2500w)
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