SpO2, saturation of peripheral oxygen; ART, antiretroviral therapy; BPH, benign prostatic hypertrophy; ACEI, angiotensin-converting enzyme inhibitor; ARB, angiotensin receptor blocker; NSAID, nonsteroidal anti-inflammatory drug; SD, standard deviation; COVID-19, coronavirus disease 2019. The gene discussed is ACE; the disease is benign prostatic hyperplasia.