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. 2020 Jul 22:M20-2973. doi: 10.7326/M20-2973

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This article is made available via the PMC Open Access Subset for unrestricted re-use for research, analyses, and text and data mining through PubMed Central. Acknowledgement of the original source shall include a notice similar to the following: "© 2020 American College of Physicians. Some rights reserved. This work permits non-commercial use, distribution, and reproduction in any medium, provided the original author and source are credited." These permissions are granted for the duration of the COVID-19 pandemic or until permissions are revoked in writing. Upon expiration of these permissions, PMC is granted a perpetual license to make this article available via PMC and Europe PMC, consistent with existing copyright protections.

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Visual Abstract. Age Distributions of Cases and COVID-19 Case Fatality Across Countries The observed COVID-19 case-fatality rate varies widely across countries. This study determined how much of the variation in case-fatality rate was the result of country-specific age-related factors (that is, age distribution of the cases and population age distribution). The information is critical for making meaningful comparisons of COVID-19 case-fatality rates across countries. — The observed COVID-19 case-fatality rate varies widely across countries. This study determined how much of the variation in case-fatality rate was the result of country-specific age-related factors (that is, age distribution of the cases and population age distribution). The information is critical for making meaningful comparisons of COVID-19 case-fatality rates across countries.