On WeChat platform, through a point-to-point connection, and carry on the questionnaire survey to collect information of liver transplant recipients followed-up by the department of Liver Surgery, Renji Hospital Shanghai Jiao Tong University. Patients meeting inclusion and exclusion criteria will be selected. Conduct statistical analysis to describe the incidence of adverse reactions related to COVID-19 vaccine after liver transplantation, and to compare and evaluate the factors leading to COVID-19 vaccine hesitancy.

On WeChat platform, through a point-to-point connection, and carry on the questionnaire survey to collect information of liver transplant recipients followed-up by the department of Liver Surgery, Renji Hospital Shanghai Jiao Tong University. Questionnaire items including demographic characteristics, understanding of COVID-19, attitude toward COVID-19 vaccine. Patients meeting inclusion and exclusion criteria will be selected. Conduct statistical analysis to describe the incidence of adverse reactions related to COVID-19 vaccine after liver transplantation, and to compare and evaluate the factors leading to COVID-19 vaccine hesitancy.

Inclusion Criteria:

1. age ≥ 18
2. recipients after liver transplantation surgery

Exclusion Criteria:

1. Incomplete data (missing questionnaire information), such as lack of age, gender, indication for transplantation, time after transplantation and other indicators
2. loss to follow-up
3. COVID-19 vaccination before liver transplantation

The subjects of this study were adult recipients who were followed up after liver transplantation in the department of Liver Surgery, Renji Hospital Shanghai Jiao Tong University.

This retrospective study involves the privacy of the participants. We need to keep it confidential and do not plan to share the data. If you want to know the relevant information, you can contact the principal person in charge of the study