Inclusion Criteria:  Adult (18 years old or elder) who prepare or have been vaccinated against COVID-19, and has not participated in similar clinical studies.  Exclusion Criteria:  People who are allergic to any active ingredient of the vaccine, any inactive ingredient which was used in the production process, or those who have been allergic to the same kind of vaccine before. People who have had severe allergic reaction to vaccine before (such as acute allergic reaction, vascular neuroedema, dyspnea, etc.) People with uncontrolled epilepsy and other serious neurological diseases (such as transverse myelitis, Guillain-Barre syndrome, demyelinating diseases, etc.) People who are feverish, or suffering from acute diseases, or suffering from acute episodes of chronic diseases, or with serious chronic diseases without control. Pregnant woman Juvenile