In line with this, we do not observe a clear correlation between CD8 and Granzyme B in H. pylori positive gastritis, while CD8 and Granzyme B do correlate in H. pylori negative gastritis samples (Figure 5(n)), indicating that H. pylori infection might impair the effector functions of CD8+ T cells in the gastric mucosa. The gene discussed is GZMB; the disease is gastritis.