CDKN1A and colorectal cancer: In both pancreatic and colorectal cancer cell lines, there is a significant negative correlation between CDKN1A expression and the killing capacity of M1 virus, which means that the lower the protein expression of CDKN1A is, the greater the cell‐killing effect of M1 virus is (Fig. 7A,B, the protein expression and cell‐killing effect of M1 are shown in Fig. S4 and Table S6).