We used non-small-cell lung cancer cells Calu-3, lung adenocarcinoma cells A549 transduced with the human viral receptor, angiotensin-converting enzyme 2 (ACE2), and lung adenocarcinoma cells PC-9, all of which we found to support SARS-CoV-2 replication (red, yellow, and blue dots, respectively, in Fig. 1A). This evidence concerns the gene ACE2 and lung adenocarcinoma.