Natural killer cell dysfunction is associated with colorectal cancer with severe COVID-19

Figure 2 Comparison of numbers and percentages of peripheral natural killer and natural killer T cells between colorectal cancer and colorectal cancer with severe the coronavirus disease 2019 patients. A: Representative histogram in peripheral blood of colorectal cancer (CRC) and CRC with severe the coronavirus disease 2019 (CRC⁺) patients; B: Comparison of natural killer (NK) and NKT cell numbers between CRC and CRC⁺ patients; C: Comparison of NK and NKT cell percentages between CRC and CRC⁺ patients. ^aP < 0.05 vs CRC⁺via Student's t test; ^bP < 0.05 vs CRC⁺via Mann-Whitney U test; CRC: Colorectal cancer; CRC⁺: Colorectal cancer with severe the coronavirus disease 2019; NK: Natural killer.