Study of Clinical Features of Patients With Autoimmune Liver Disease Complicated With Covid-19 and the Immune Mechanism Affecting Prognosis

Group A: 1) Aged 18-75; 2) AIH patients diagnosed by AIH comprehensive scoring diagnosis system; 3) No history of other malignant tumors; 4) No metabolic diseases such as hypertension and diabetes; 5) No serious circulatory and respiratory diseases; 6) Non-alcoholic liver disease, drug-induced hepatitis, viral hepatitis and other liver diseases; 7) Exclude pregnant and lactating women. Group B: 1) Aged 18-75 years; 2) Patients with PBC diagnosis; 3) No history of other malignant tumors; 4) No metabolic diseases such as hypertension and diabetes; 5) No serious circulatory and respiratory diseases; 6) Non-alcoholic liver disease, drug-induced hepatitis, viral hepatitis and other liver diseases; 7) Exclude pregnant and lactating women. Group B: 1) Aged 18-75 years; 2) Patients with PBC diagnosis; 3) No history of other malignant tumors; 4) No metabolic diseases such as hypertension and diabetes; 5) No serious circulatory and respiratory diseases; 6) Non-alcoholic liver disease, drug-induced hepatitis, viral hepatitis and other liver diseases; 7) Exclude pregnant and lactating women. Group B: 1) Aged 18-75 years; 2) Patients with PBC diagnosis; 3) No history of other malignant tumors; 4) No metabolic diseases such as hypertension and diabetes; 5) No serious circulatory and respiratory diseases; 6) Non-alcoholic liver disease, drug-induced hepatitis, viral hepatitis and other liver diseases; 7) Exclude pregnant and lactating women. Group E: Those who had no previous history of COVID-19 infection and had been vaccinated against COVID-19. \- \-