Influenza vaccination begins in autumn. Why do you need an annual flu shot?

Because the flu vaccine is only valid for six to eight months, and the flu virus mutates every year, it is necessary to get the flu pain vaccine every year.

Influenza vaccine is a relatively short-term vaccine. It is only valid for 6-8 months. People who are vaccinated against influenza in autumn will lose their function before next summer. If they are not vaccinated in time in autumn, their antibodies will disappear and their resistance to influenza will decline. This is because the probability of influenza infection is relatively high, which is easy to affect health. Therefore, they need to be vaccinated with influenza vaccine every year to play a good preventive role and reduce the infection rate of influenza.

Influenza virus is a common virus that mutates every year. People infected with these viruses will get the flu. However, the vaccine inoculated in the human body before has no good resistance to the mutated influenza virus and cannot effectively protect the human body at all. If it is confirmed that the new influenza vaccine cannot be vaccinated in time, it will not prevent the occurrence of influenza, which is also an important reason why people need to be vaccinated every year.

Some people in life have poor immunity and are prone to influenza virus. Encephalitis and viral pneumonia occur after being infected with influenza virus, which is quite harmful. Therefore, these people need to be vaccinated with influenza vaccine every year to improve their antiviral ability, reduce the harm of influenza virus to their own bodies and prevent the occurrence of influenza. This is also an important reason why CDC advises people to get flu vaccine every year.

The flu vaccine needs to be vaccinated every year. Only in this way can we play a good preventive role, protect the human body from the invasion and damage of influenza virus and reduce the incidence of influenza. However, when vaccinating influenza vaccine, we should also pay attention to the fact that people with nervous system diseases are not suitable for vaccination, and it is not suitable for vaccination when the body is in a sub-health state, which will aggravate the condition and is not conducive to the effective function of influenza vaccine. After each flu shot, you should observe for half an hour. If there is any discomfort, they must be observed.