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All data are sourced from Table A5 of "Projecting hospital utilization during the COVID-19 outbreaks in the United States", published in the Proceedings of the National Academy of Science on April 3, 2020, unless otherwise noted https://www.pnas.org/content/early/2020/04/02/2004064117
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Age range0-1920-4950-6465+Weighted total
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Proportion of cases that exhibit mild symptoms (based on reported cases in different age groups)80%80%40%20%66%
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Calculation: Proportion of cases that exhibit severe and critical illness20%20%60%80%34%
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Proportion of symptomatic patients with severe and critical illness requiring hospital care or ICU2.5%32.0%32.0%64.0%27%
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Proportion of hospitalized cases requiring ICU1.4%4.2%7.5%15.0%5%
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Calculation: Proportion of total cases that require ICU0.01%0.27%1.44%7.68%1.29%
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Proportion of total U.S. population (sourced from next tab)28.6%43.6%15.3%12.4%
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