. 2022 May 6;10(5):728. doi: 10.3390/vaccines10050728
© 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/).
Figure 3.
Antibody level divided by the cut-off value.