The ACE2 protein was highly expressed in COAD, KICH, KIRP, pancreatic adenocarcinoma (PAAD), READ, SARC, stomach adenocarcinoma (STAD), TGCT, THCA, lung adenocarcinoma (LUAD), and LUSC, which suggested a high susceptibility of patients with these types of cancers to SARS-CoV-2 infection. Here, ACE2 is linked to cancer.