inclusion criteria: 1. subjects with chronic liver disease (cld) at the humanity and health medical group and eligible for the hk government vaccination programme; 2. able to understand and sign informed consent.; 3. underlying cld- defined as patients with chronic hepatitis b or c infections, liver cirrhosis, metabolic associated liver disease, hepatocellular carcinoma, alcoholic liver disease, autoimmune hepatitis, hemochrombtosis.

inclusion criteria: 1. subjects with chronic liver disease (cld) at the humanity and health medical group and eligible for the hk government vaccination programme; 2. able to understand and sign informed consent.; 3. underlying cld- defined as patients with chronic hepatitis b or c infections, liver cirrhosis, metabolic associated liver disease, hepatocellular carcinoma, alcoholic liver disease, autoimmune hepatitis, hemochrombtosis.

inclusion criteria: subjects with chronic liver disease (cld) at the humanity and health medical group and eligible for the hk government vaccination programme; able to understand and sign informed consent.; underlying cld- defined as patients with chronic hepatitis b or c infections, liver cirrhosis, metabolic associated liver disease, hepatocellular carcinoma, alcoholic liver disease, autoimmune hepatitis, hemochrombtosis.

inclusion criteria: subjects with chronic liver disease (cld) at the humanity and health medical group and eligible for the hk government vaccination programme; able to understand and sign informed consent.; underlying cld- defined as patients with chronic hepatitis b or c infections, liver cirrhosis, metabolic associated liver disease, hepatocellular carcinoma, alcoholic liver disease, autoimmune hepatitis, hemochrombtosis.

inclusion criteria: 1. subjects with chronic liver disease (cld) at the humanity and health medical group and eligible for the hk government vaccination programme; 2. able to understand and sign informed consent.; 3. underlying cld- defined as patients with chronic hepatitis b or c infections, liver cirrhosis, metabolic associated liver disease, hepatocellular carcinoma, alcoholic liver disease, autoimmune hepatitis, hemochrombtosis.

inclusion criteria: 1. subjects with chronic liver disease (cld) at the humanity and health medical group and eligible for the hk government vaccination programme; 2. able to understand and sign informed consent.; 3. underlying cld- defined as patients with chronic hepatitis b or c infections, liver cirrhosis, metabolic associated liver disease, hepatocellular carcinoma, alcoholic liver disease, autoimmune hepatitis, hemochrombtosis.