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. Author manuscript; available in PMC: 2022 Sep 7.
Published in final edited form as: Lancet Microbe. 2021 Dec 6;3(2):e113–e123. doi: 10.1016/S2666-5247(21)00235-4

Figure 1. Flow diagram of the four study cohorts.

Figure 1

Overview of the number of participants in each study, of the timepoints at which peripheral whole blood samples were collected with day 0 as baseline before vaccination, and the number of participants who were given the various vaccine doses or placebo. pfu=plaque-forming units.