H2AX and infection: Levels of γ-H2AX in RD cells (MOI = 1) and HeLa cells (MOI = 10) were increased after infection with CA16 for 24 h, as well as after infection with CA6 (RD cells, MOI = 5) or EVD68 (RD cells, MOI = 5) for 24 h (Figure 1e).