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. 2021 Oct 8;9(10):1145. doi: 10.3390/vaccines9101145

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© 2021 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/).

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(a) The total anti-S antibodies (including IgG) to the SARS-CoV-2 spike protein receptor-binding domain (RBD) counts by age. Data were measured at 3 and 5 weeks after first vaccination and 4 months after second vaccination. (b) NeuTable 3 and 5 weeks after first vaccination and 4 months after second vaccination with an ELISA-based SARS-CoV-2 Surrogate Virus Neutralization Test Kit.