COVID-19(86) Hepatitis B virus(60) SARS-CoV-2(52) HBV(42) liver(40) vaccination(36) cirrhosis(36) Patient(35) Hepatocellular carcinoma(34) Liver transplantation(29) hepatitis B(28) Chronic Hepatitis B(28) dose(23) chronic liver disease(23) Autoimmune hepatitis(22) SARS-COV-2 infection(21) COVID-19 vaccination(20) recipient(19) Vaccine(19) antiviral therapy(19) Treatment(19) Hepatitis(19) antibody(17) BNT162b2(17) Immunosuppression(17) entecavir(16) patients(16) Immunity(16) hepatitis E virus(15) recipients(15)