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. 2021 Jul 13;17(10):3276–3280. doi: 10.1080/21645515.2021.1945901

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© 2021 The Author(s). Published with license by Taylor & Francis Group, LLC.

This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives License (http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited, and is not altered, transformed, or built upon in any way.

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Figure 2. — Pipeline of trials on Covid-19 vaccine candidates worldwide (n = 418)

Footnote: Among the 417 Covid-19 vaccine trials, technology platform for 396 trials was clarified. The above figure displayed the technology platform combined with its clinical progress. Abbreviation: Protein subunit (PS); Viral vector non-replicating (VVNR); Inactivated virus (IV); Virus-like particle (VLP); Viral vector replicating (VVR); Viral vector replicating combined with antigen presenting cell (VVR+APC); Live attenuated virus (LAV); Dendritic cell (DCV), T cell-based (TCV).