COVID-19(4) Chronic Hepatitis B(3) Hepatitis B virus(3) Prognosis(2) immune response(1) Nasopharyngeal swab.(1) gene polymorphism.(1) Viral pneumonia.(1) Single nucleotide polymorphism (SNP)(1) Hepatocellular carcinoma(1) pulmonary Influenza A (H1N1)(1) Critically ill(1) Core promoter(1) RT-PCR(1) TRAIL(1) Biomarkers(1) Mean platelet volume (MPV)(1) Programmed cell death 1 (PD-1)(1) vitamin D3.(1) Serology.(1) zinc finger protein.(1) antibody specificity(1) risk factor(1) Regulatory T cell.(1) pharmacology.(1) mortality.(1) Progress(1) liver cirrhosis.(1) SARS-CoV-2 variants(1) Mortality(1)