Li Dong, chief physician of the Department of Infectious Diseases at Beijing You'an Hospital affiliated to Capital Medical University, once said that it is not possible to have a protective effect immediately after getting the vaccine; it is necessary to give the vaccine time to produce protective antibodies, so it is necessary to get vaccinated as soon as possible and set up a protective system for the body in advance. If you don't get vaccinated against influenza before November, you can still get vaccinated throughout the influenza season, especially “one old, one young,” and people at high risk of getting severe influenza, such as those with chronic underlying diseases. In the same influenza season, people who have been fully vaccinated according to the immunization procedure do not need to be vaccinated repeatedly.

Li Dong, chief physician of the Department of Infectious Diseases at Beijing You'an Hospital affiliated to Capital Medical University, once said that it is not possible to have a protective effect immediately after getting the vaccine; it is necessary to give the vaccine time to produce protective antibodies, so it is necessary to get vaccinated as soon as possible and set up a protective system for the body in advance. If you don't get vaccinated against influenza before November, you can still get vaccinated throughout the influenza season, especially “one old, one young,” and people at high risk of getting severe influenza, such as those with chronic underlying diseases. In the same influenza season, people who have been fully vaccinated according to the immunization procedure do not need to be vaccinated repeatedly.