We could observe a significant increase (indicated by a stimulation index, SI, of ≥ 1.5) of AIM+ CD4+ and CD8+ T cells after stimulation with the peptide pool in the samples of n = 9 individuals with COVID‐19 and n = 8 individuals after vaccination (Figure 5b and Supplementary figure 12b). The gene discussed is CD4; the disease is COVID-19.