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. 2023 Apr;29(4):761–770. doi: 10.3201/eid2904.221605

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Emerging Infectious Diseases is a publication of the U.S. Government. This publication is in the public domain and is therefore without copyright. All text from this work may be reprinted freely. Use of these materials should be properly cited.

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Flow diagram of reported outbreaks included in analysis of SARS-CoV-2 infections in nursing homes during periods of Delta and Omicron variant predominance, United States, July 2021–March 2022. *See Table, Figure 2; †see Figures 3 and 5 for infection attack rate and risk ratio analysis; ‡see Figures 4 and 6 for outcomes attack rate and risk ratio analysis.