To investigate the expression of CCL19 in CRC cells, the cells, including HT29, SW620, HCT116, Lovo, CT26, and CCD841, were infected with rPR8-CCL19 (MOI = 0.01) for 72 h, and the supernatants were collected for detecting CCL19 content through ELISA testing. The gene discussed is CCL19; the disease is colorectal carcinoma.