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. 2022 May 30;13:817597. doi: 10.3389/fimmu.2022.817597

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Copyright © 2022 Farid, Herrera-Uribe and Stevenson

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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S antibody levels monitored after double vaccination with the Sinopharm vaccine and the Pfizer/BioNtech vaccine booster. (A) S antibody levels of 15 healthy individuals after double Sinopharm vaccination (1st sampling) and subsequent antibody level monitoring (2nd sampling). (B) S antibody levels of 15 healthy individuals after double Sinopharm vaccination (1st sampling) (different individuals from panel A) and after Pfizer/BioNtech booster (2nd sampling). Differences between groups were assessed by Mann Whitney test. The asterisk indicate ***p value < 0.001. ns, not significant.