Timely enhancement of the immunization with the new crown vaccine can effectively improve the antibody level and better respond to the COVID-19 mutant. Today, Changsha CDC issued an appeal to those who meet the conditions for enhanced vaccination to implement enhanced immunization as soon as possible. It is understood that Changsha has made great efforts to promote the vaccination of the new crown vaccine. As of March 2, 2022, the city has reported 2.4308 million doses of the new crown vaccin...