If you have not been infected in a previous outbreak but have not completed the established immunization schedule, you will need to continue to complete subsequent doses of vaccination. People aged 3-17 need to complete 2 doses of inactivated vaccine or 3 doses of Zhifei recombinant protein vaccine.
People over 18 years old should complete the first dose of booster immunization on the basis of basic immunization. People with high-risk infection, elderly people over 60 years old, people with more serious underlying diseases and immunocompromised people need tocomplete the second booster dose.