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. 2023 Jun 2;72(22):601–605. doi: 10.15585/mmwr.mm7222a3

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The figure is a bar chart showing prevalences of vaccine-induced, infection-induced, and hybrid immunity against SARS-CoV-2 among U.S. blood donors aged ≥16 years, by age group during April 2021–September 2022. — Prevalences of vaccine-induced, infection-induced, and hybrid* immunity^† against SARS-CoV-2 among blood donors aged ≥16 years, by age group — United States, April 2021–September 2022

* Immunity derived from a combination of vaccination and infection.

^† Ascertained by the presence of anti-spike antibodies (present in both COVID-19–vaccinated and SARS-CoV-2–infected persons) and anti-nucleocapsid antibodies (present only in previously infected persons) and self-reported history of vaccination.