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. 2021 Mar 5;9(3):223. doi: 10.3390/vaccines9030223

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Numbers of new severe and critical disease cases in the United States assuming (A) a vaccine that protects against both infection and disease and (B) a vaccine that protects only against disease. Numbers of new severe and critical disease cases in China assuming (C) a vaccine that protects against both infection and disease and (D) a vaccine that protects only against disease. These scenarios assume gradual easing of restrictions within 6 months. Shaded areas are the results of the 500 uncertainty runs, while the solid line is the mean of those runs.