(18) is significantly higher in ACE2 high expressed cell lines than ACE2 low expressed cell lines (Student’s t-test, P < 0.05) (Figure 1J), indicating high ACE2 expressed cells may be more susceptible to SARS-Cov-2, suggesting that patients with lung cancer were more likely to be susceptible to COVID-19. This evidence concerns the gene ACE2 and lung cancer.