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. 2020 Aug 21;22(8):e21173. doi: 10.2196/21173

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©Qi Deng. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 21.08.2020.

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 the Journal of Medical Internet Research, is properly cited. The complete bibliographic information, a link to the original publication on http://www.jmir.org/, as well as this copyright and license information must be included.

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The SEIRQJD (Susceptible–Exposed–Infectious–Recovered–Quarantined–Isolated–Deceased) Model. E: Exposed; Q: Quarantined; I: Infectious; D: Deceased; S: Susceptible; I: Infectious; J: Isolated; R: Recovered. The transmission parameters (Greek letters) are - β: from Susceptible (S) to Exposed (E) if Exposed (E) is reported directly, or Susceptible (S) to Infectious (I) if Exposed (E) is not reported directly; σ^I, σ^Q: from Exposed (E) to Infectious (I) and Quarantined (Q), respectively; κ^I: from Quarantined (Q) to Infectious (I); γ^J, γ^R, γ^D: from Infectious (I) to Isolated (J), Recovered (R) and Deceased (D), respectively; υ^R, υ^D: from Isolated (J) to Recovered (R) and Deceased (D), respectively.