This article has been retracted: please see Elsevier Policy on Article Withdrawal (https://www.elsevier.com/about/policies/article-withdrawal). This article has been retracted at the request of the authors. The authors would like to express their deepest apologies for the error contained in their article and for any concerns or misunderstandings it may have caused. Specifically, the article mistakenly mentioned the presence of the MF59 adjuvant in the AZD1222 vaccine formulation, which is incorrect.
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