Well at least there's a potential misunderstanding of its definition and how it comes about.
From the below, vaccines are an important element at building herd immunity, that is, its not simply a matter of exposing communities to a virus and hoping an immunity response will develop in isolation.
A great explanation referenced from the CDC site.
https://www.historyofvaccines.org/content/herd-immunity-0
https://www.cdc.gov/careerpaths/scienceambassador/documents/herd-immunity-2013.pdf
Ann: EAP for Remestemcel-L in Children with MIS-C due to COVID-19, page-127
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