In contrast to neutrophils, numbers of monocytes, CD3+ T cells, irrespective whether TCR alpha/beta+ or TCR gamma/delta+, similar to the CD3+CD4+ and CD3+CD8+ T‐cell subsets, CD56+ NK cells and CD19+ B cells did not reveal significant differences between COVID‐19 convalescent patients and healthy control individuals (Figure 1 and Table S3). Here, CD19 is linked to COVID-19.