1. The booster immunization has been completed: including those who have been vaccinated with three doses of COVID-19 vaccine (Vero cells) and two doses of COVID-19 vaccine (adenovirus vector) or have been vaccinated in sequence;
2. Basic immunization has been completed: including people who have been vaccinated with two doses of COVID-19 vaccine (Vero cells), one dose of COVID-19 vaccine (adenovirus vector) and three doses of COVID-19 vaccine (CHO cells);
3. Basic immune insufficiency: including those who have been vaccinated with one COVID-19 vaccine (Vero cells) and one or two COVID-19 vaccines (CHO cells);
4. Inappropriate vaccination: including those who have long-term contraindications in the contraindications database and those who have suspended vaccination in the contraindications database (such personnel need to go to the vaccination site for evaluation and then be entered into the system by the vaccination doctor);
5. Vaccination information has not been found: including people who have not found vaccination information of COVID-19 in COVID-19 Vaccination Database.