When we previously examined homotypic T‐cell responses following COVID‐19 in SOT recipients (E.g., ancestral responses following ancestral infection or BA.1 responses following BA.1 infection), we observed a hierarchy: IL‐2 monofunctional > polyfunctional > IFN‐γ monofunctional CD4+ subsets [4, 21]. Here, CD4 is linked to infection.