. Author manuscript; available in PMC: 2022 Oct 28.
Published in final edited form as: Vaccine. 2021 Jan 26;40(Suppl 1):A26–A29. doi: 10.1016/j.vaccine.2021.01.036
This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).