The expression of MCM3 was significantly positively correlated with the infiltration level of CD4+ T cells (R = 0.133, p = 2.66e − 02), neutrophils (R = 0.137, p = 2.23e − 02), B cells (R = 0.214, p = 3.31e − 04), and CD8+ T cells (R = 0.127, p = 3.45e − 02), while the expression of MCM3 was significantly negatively correlated with the infiltration level of macrophages (R = −0.201, p = 7.67e − 04) and dendritic cells (R = −0.208, p = 4.91e − 04) in cervical cancers (Figure 4). The gene discussed is CD8A; the disease is cervical carcinoma.