We noted that the mortality in pre‐diagnosed diabetic COVID‐19 patients without any anti‐hyperglycaemic drugs was 32.4% while the mortality was 7.9% in insulin‐, 4.1% in metformin‐, 0% in SU/GLN‐ and 2.3% in AGI‐treated patients, respectively (Table 4). The gene discussed is INS; the disease is COVID-19.