Reasons for babies to have fever after receiving Japanese encephalitis vaccine

It is normal for babies to get vaccinated. Vaccination can effectively prevent the invasion of some serious diseases. Japanese encephalitis vaccine is one of them. Every parent needs to take their baby to get this vaccine. The most troublesome thing is that the baby has some adverse reactions. Fever is a symptom of every vaccine. Next we will introduce to you in detail the reasons why babies have fever after receiving Japanese encephalitis vaccine.

Fever after receiving the Japanese encephalitis vaccine is generally a normal immune response, but parents should not take it lightly. Some babies will experience adverse reactions after vaccination and even cause irreversible diseases.

Vaccines used for immunization mainly have three components: immune antigen, solution and adjuvant.

Some immunizing antigens contain only a single and pure polysaccharide protein or toxoid (such as diphtheria and tetanus vaccines), while others contain complex whole-strain live viruses (such as measles, German measles, mumps, oral polio vaccines) or killed bacteria (such as pertussis vaccine).

The solution used with the vaccine can be simple distilled water or saline, or it can be a tissue culture medium with more complex ingredients, which may contain some proteins, egg white antigens or other types of animal tissues (such as Japanese encephalitis vaccine), etc. In addition, a small amount of preservatives, antibiotics, and stabilizers are often added to prevent the vaccine from being contaminated and to stabilize the antigens.

Adjuvants are used to enhance and prolong the antigenicity and immune efficacy of vaccines (such as three-in-one vaccines). Adverse reactions after vaccination may be related to all three ingredients.

Almost all vaccines can cause a fever. Among them, the three-in-one vaccine is the most common. About half of the young children will have a fever, which usually occurs within one day and rarely lasts for more than two days. Fever from measles vaccine occurs five to ten days after vaccination.

The above content is an introduction to the reasons why babies have fever after receiving the Japanese encephalitis vaccine. Fever can be treated as usual, with physical cooling and drug cooling. If the baby is sensitive to the drug, physical cooling can be used. This will not cause side effects to the child and can also reduce the harm caused by the drug.