S100A8 and infection: Further studies performed using the supernatant of NCI-N87 cells after infection with EBV alone, coinfection with H. pylori(WT) and EBV, and coinfection with H. pylori(CagA−) and EBV to infect fresh gastric NCI-N87 cells showed a dramatic drop in infection potency at 2 dpi, with some recovery at 5 dpi (Fig. S5A and B).