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. 2022 Mar 15;11(1):829–840. doi: 10.1080/22221751.2022.2048969

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© 2022 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 3. — Duration of neutralizing antibody titres after booster vaccinations. (a, b) Long-term profile of EC₅₀ titers based on pVNT against Wuhan-1 strain and Omicron strain for I-I-I group (n = 20 at D0 and D14, n = 13 at 1M). (c, d) Long-term profile of EC₅₀ titres based on pVNT against Wuhan-1 strain and Omicron strain for I-I-S group (n = 25 at D0 and D14, n = 23 at 1M, n = 10 at 3M). (e, f) NT₅₀ titres against Wuhan-1 strain and Omicron strain at D0, D14 and 1M post inactivated booster vaccination (n = 20 at D0 and D14, n = 13 at 1M). (g, h) NT₅₀ titres against Wuhan-1 strain and Omicron strain at D0, D14, 1M and 3M post RBD subunit booster vaccination (n = 25 at D0 and D14, n = 23 at 1M, n = 10 at 3M). ns, not significant; *P < 0.05, ***P < 0.001, ****P < 0.0001.