COVID-19(17) Cancer(10) Hepatitis B virus(10) Epidemiology(8) Diagnosis(8) Liver cancer(7) Africa(6) Care(6) case-control study(6) affected(6) COVID-19 pandemic(6) Treatment(6) Hepatocellular carcinoma(6) SARS-CoV-2(5) cancers(5) cancer registry(5) allergy(4) hepatocellular carcinoma.(4) Mortality(4) serology(4) glioma(4) HBV(4) Case-control(4) HCC(4) varicella.(4) cohort study(4) the median(3) liver cancer.(3) Region(3) Breast(3)