Hepatitis B virus(2) HBcAg(1) serum(1) HBeAg(1) Coronavirus disease 2019(1) Liver cirrhosis(1) severe acute respiratory syndrome coronavirus 2(1) Angiotensin-converting enzyme(1) mutation.(1) HBsAg(1) ACE2(1) Hepatocellular carcinoma(1) SARS-CoV-2(1) telbivudine.(1)