In order to establish a national immunization barrier and ensure the life, health and safety of the people, on December 8, the community health service center of Diaozhuang Street, Tianning District once again set up a point in Hualida, and provided the third booster injection. Hualida has completed the vaccination for 1,800 vaccinators at intervals of more than half a year, laying a solid foundation for building a population immune barrier as soon as possible.