What is the flu vaccine

We often hear that children should be given flu vaccines in a timely manner, but do you know what a flu vaccine is? The so-called flu vaccine mainly refers to a measure to prevent and control influenza in normal times. This method can help us reduce the chance of infection for the vaccine recipient or alleviate the symptoms of influenza, so it is necessary to understand what a flu vaccine is.

Do you know what the flu vaccine is? In fact, the flu vaccine is currently the most effective method to prevent infectious diseases. This phenomenon is mainly suitable for healthy people who may have been infected with any influenza virus. If you want to get a flu vaccine, you should get it once before the influenza epidemic season each year, and the immunity can last for one year. The flu vaccine cannot cure all colds. It can prevent influenza viruses, but it cannot prevent the occurrence of the common cold. It can only relieve the symptoms of the common cold and shorten the cold cycle. Moreover, even if you are vaccinated against influenza, it will take half a month for antibodies to be produced and achieve the purpose of prevention.

After the influenza vaccine is administered, protective antibodies are rapidly produced in the human body, usually taking effect within two weeks. Protective antibodies can last in the human body for one year. However, since the antibody levels produced in the human body after vaccination will decrease over time, and the strain components of the vaccine change each year due to different prevalent dominant strains, the influenza vaccine of the year needs to be administered every year. It can protect against infection with strains that are antigenically similar to the vaccine strain or alleviate the symptoms of the disease. Due to the decline in antibody levels, the strains contained in the vaccine each year vary depending on the prevalent strains. Therefore, it is necessary to receive the influenza vaccine of that year every year to achieve the best immune effect and produce a good immune effect.

After vaccination, children should be careful to keep the vaccination site clean and prevent it from getting wet. Pay attention to observe the child's physical signs within one day after vaccination. A few children will have slight discomfort, such as short-term mild pain, redness and swelling at the vaccination site. A few children may have a low fever. These are all normal phenomena and will generally disappear naturally after 24 hours. If the child has persistent fever, local redness and swelling that does not go away, etc., you need to take the child to the hospital for treatment.

After knowing what the flu vaccine is, we should vaccinate our children in a timely manner and pay attention to changes in their bodies after the vaccination. If any discomfort occurs, we should take the children to the hospital for treatment in time to help them out of danger.