Published on in Vol 8, No 12 (2020): December
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/22098, first published
.
![Evaluation of the Design and Implementation of a Peer-To-Peer COVID-19 Contact Tracing Mobile App (COCOA) in Japan Evaluation of the Design and Implementation of a Peer-To-Peer COVID-19 Contact Tracing Mobile App (COCOA) in Japan](https://asset.jmir.pub/assets/c198ff2cfe0ef54f4c538f928d6e419c.png 480w,https://asset.jmir.pub/assets/c198ff2cfe0ef54f4c538f928d6e419c.png 960w,https://asset.jmir.pub/assets/c198ff2cfe0ef54f4c538f928d6e419c.png 1920w,https://asset.jmir.pub/assets/c198ff2cfe0ef54f4c538f928d6e419c.png 2500w)
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