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. 2021 Jul 13;9:580585. doi: 10.3389/fpubh.2021.580585

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Copyright © 2021 Mansab, Donnelly, Kussner, Neil, Bhatti and Goyal.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Scatter graphs with best-fit line for primary measure and confounders vs. CFR (N = 26). CFR is along the vertical axis in each and measured as percentage ratio. (A) Comparison of national CFR vs. nationally recommended target SpO2 (%) in COVID-19. (B) CFR vs. burden of cases measured by total number of cases per million inhabitants. (C) CFR vs. Testing Rate measured by total number of tests undertaken per thousand inhabitants (tests/thousand). (D) CFR vs. the overall positivity ratio (%), measured as the percentage ratio of positive tests to total tests. CFR, case fatality rate; SpO₂, oxygen saturations. CFR, case fatality rate; SpO₂, oxygen saturations.