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. 2023 Feb 4;10(2):ofad063. doi: 10.1093/ofid/ofad063

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© The Author(s) 2023. Published by Oxford University Press on behalf of Infectious Diseases Society of America.

This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs licence (https://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial reproduction and distribution of the work, in any medium, provided the original work is not altered or transformed in any way, and that the work is properly cited. For commercial re-use, please contact journals.permissions@oup.com

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Figure 3. — Omicron (BA.1) strain neutralization titers over time in booster series with BNT162b2 mRNA vaccination in healthcare workers (HCW) and nursing home (NH) residents, with and without prior severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. Violin plots show Omicron (BA.1) strain pseudovirus neutralization (pNT50) values during the booster series for (A) HCWs and (B) NH residents. The upper limit of detection of the assay is 1:8748 and the lower limit of detection is 1:12. Participants who were SARS-CoV-2 naive (SARS-CoV-2-naive) are shown in orange, participants with prior SARS-CoV-2 infection (SARS-CoV-2-experienced) are shown in purple, open plots are from cytomegalovirus (CMV) seronegative (CMV⁻) donors, and filled plots are from CMV seropositive (CMV⁺) donors. N values indicate the number of participants measured in each group. P values are between CMV⁻ and CMV⁺, determined by least squares multiple linear regression, adjusted for age, sex, and race. P values less than .05 are considered statistically significant and are depicted in bold font.