After adjusting for age, sex, BMI, hypertension, diabetes, drinking habits, smoking habits, cardiocerebrovascular diseases, and cancer, logistic regression analysis revealed that females (OR = 2.255, 95% CI = 1.770–2.872), subjects with hypertension (OR = 1.264, 95% CI =1.075–1.486), subjects with cardiocerebrovascular diseases (OR = 1.271, 95% CI = 1.023–1.579), subjects with cancer (OR = 1.695, 95% CI = 1.253–2.293), and subjects above 60 years of age (OR = 3.097, 95% CI = 1.078–8.896) are at an increased risk for infection due to their high expression of ACE2. This evidence concerns the gene ACE2 and cancer.