Published on in Vol 9, No 2 (2021): February
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/25245, first published
.
![Blockchain-Based Digital Contact Tracing Apps for COVID-19 Pandemic Management: Issues, Challenges, Solutions, and Future Directions Blockchain-Based Digital Contact Tracing Apps for COVID-19 Pandemic Management: Issues, Challenges, Solutions, and Future Directions](https://asset.jmir.pub/assets/1fb0b566429cd3d210b1cf242da3fc36.png 480w,https://asset.jmir.pub/assets/1fb0b566429cd3d210b1cf242da3fc36.png 960w,https://asset.jmir.pub/assets/1fb0b566429cd3d210b1cf242da3fc36.png 1920w,https://asset.jmir.pub/assets/1fb0b566429cd3d210b1cf242da3fc36.png 2500w)
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