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. 2021 Jan 7;149:e19. doi: 10.1017/S0950268821000030

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© The Author(s) 2021

This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 3. — Comparison of the COVID-19 epidemic dynamics between the higher and lower blood type A populations. (a) IC-begin, infection cases on the first day when infection cases began to increase exponentially; DC_Dpp(1/2), death cases on 26th day after IC-begin; IC_Dpp(1/2), infection cases on 26th day after IC-begin. (b) ICGF, infection case growth factor per day; RN, reproductive number; DCGF, death case growth factor per day. (c) IC-dt, infection case doubling time per day; DC-dt, death case doubling time per day.