CD27 and Miyoshi myopathy: Interestingly, we observed differences in the memory T cell subset distribution of SARS-CoV-2-specific CD8+ T cells with lower proportions of more early differentiated central memory (TCM) T cell subsets (defined as CD45RA−, CCR7+ and CD27+) as well as higher frequencies of effector memory 1 T cells (TEM1) (defined as CD45RA−, CCR7− and CD27+) and effector memory 3 T cells (TEM3) (defined as CD45RA−, CCR7− and CD27−) in MM patients (Figure 2E).