We evaluated the percentage of naïve (CCR7+CD45RA+) T cells, central memory T cells (TCM, CCR7+CD45RA−), effector memory T cells (TEM, CCR7−CD45RA−) and effector memory cells re-expressing CD45RA (TEMRA, CCR7−CD45RA+ T cells) in these groups in relation to CMV infection (Figure 1). Here, CCR7 is linked to cytomegalovirus infection.