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. 2020 Sep 7;8(9):e22321. doi: 10.2196/22321

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©Ichiro Nakamoto, Sheng Wang, Yan Guo, Weiqing Zhuang. Originally published in JMIR mHealth and uHealth (http://mhealth.jmir.org), 07.09.2020.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work, first published in JMIR mHealth and uHealth, is properly cited. The complete bibliographic information, a link to the original publication on http://mhealth.jmir.org/, as well as this copyright and license information must be included.

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Screenshots of the QR-based approach for individuals: (A) QR code, (B) health status update, (C) risk self-triage, (D) contact tracing, (E) health care appointment, (F) request for QR codes for family members, (G) psychiatric consultation.