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. 2022 Mar 19;10(3):479. doi: 10.3390/vaccines10030479

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© 2022 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 (https://creativecommons.org/licenses/by/4.0/).

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Impact on the hospital admissions of 10 million booster shots depending on the targeted age groups, over the period from 1 September 2021 to 1 March 2022, compared to a baseline scenario of no booster shots. In all strategies, primary vaccination is stopped on 1 September 2021. (A,C,E) Vaccine efficacy decreased only for people aged 65 years and older. (B,D,F) Vaccine efficacy decreased for all age groups. (A,B) Daily new hospitalizations, (C,D) proportion of hospitalizations avoided, (E,F) proportion of hospitalizations avoided by age group.