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Silas J, Jones A, Weiss-Cohen L, Ayton P.Silas J, et al. Among authors: ayton p.Vaccine. 2021 Dec 20;39(52):7590-7597. doi: 10.1016/j.vaccine.2021.11.027. Epub 2021 Nov 15.Vaccine. 2021.PMID: 34802787Free PMC article.