CD4 and cancer: The findings showed that total T cell% (Figure 2B) and CD8+ T cell% (Figure 2F) in Omicron-infected cancer patients were lower than those in non-Omicron-infected cancer patients (both P <0.01), while CD4+T/CD8+T (Figure 2G), total B cell count (Figure 2H), and total B cell% (Figure 2I) were higher (P <0.05, P <0.01, and P <0.001).