Surprisingly, in contrast to what was reported we did not detect activation of the ATM/Chk2 dependent pathway in peripheral blood B-cells following EBV inoculation (Figure 4B and 4C) except for a minimal increase of the ATM total-to-phosphorylation ratio after EBV infection similar to what we observed in TBCs. Here, CHEK2 is linked to Epstein-Barr virus infection.