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. 2022 May 26:ciac416. doi: 10.1093/cid/ciac416

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Published by Oxford University Press on behalf of the Infectious Diseases Society of America 2022. This work is written by (a) US Government employee(s) and is in the public domain in the US.

This work is written by (a) US Government employee(s) and is in the public domain in the US.

This article is made available via the PMC Open Access Subset for unrestricted re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for the duration of the COVID-19 pandemic or until permissions are revoked in writing. Upon expiration of these permissions, PMC is granted a perpetual license to make this article available via PMC and Europe PMC, consistent with existing copyright protections.

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Figure 2. — Association between prevaccination IC50 and fold-changes in neutralizing antibody response. Scatterplot and Pearson correlation coefficients between prevaccination IC50 and fold-change response at 1 and 6 months. Not shown: similar correlation with prevaccination IC50 found at 10 and 12 months (R = −0.40, P = .0015; and R = −0.54, P < .0001 respectively). IC50, half maximal inhibitory concentration.