Side Effects of the Japanese Encephalitis Vaccine
Sep 13, 2022
Source: Cainiu Health
Dr. He Haochen
Introduction
First is fever—many children develop a fever after receiving the Japanese encephalitis vaccine. Usually, it is a mild fever, below 38°C, accompanied by general weakness and chills. Under normal circumstances, this may be managed with antipyretic medications; however, if the fever persists beyond 24 hours, immediate medical attention is required, and treatment should be conducted under a doctor's guidance. In个别 cases, children may experience localized redness and swelling at the injection site after receiving the Japanese encephalitis vaccine.
Vaccines help prevent diseases, and many newborns currently require injections shortly after birth. The Japanese encephalitis (JE) vaccine is one of the most common vaccines. What are the side effects of the JE vaccine?
Side Effects of the Japanese Encephalitis Vaccine
First is fever—many children develop a fever after receiving the JE vaccine. Typically, this involves a low-grade fever below 38°C, accompanied by general weakness and chills. This is usually normal and can sometimes be managed with fever-reducing medications. However, if the fever persists beyond 24 hours, immediate medical attention is required, and treatment should be administered under a doctor’s guidance.
Another possible reaction is allergy. Some children may experience localized redness, swelling, pain at the injection site, or develop rashes on the body after receiving the JE vaccine. Generally, these symptoms subside as body temperature returns to normal. However, with repeated vaccinations, more severe reactions such as angioedema or even anaphylactic shock may occur. These recurring side effects tend to be more common in children over the age of seven. Attenuated live vaccines may also cause other symptoms such as dizziness and headache. Localized swelling can be treated with warm compresses, but if severe convulsions or other serious reactions occur, parents should promptly take the child to a正规 hospital for proper medical care.
The Japanese encephalitis vaccine is an effective way to prevent infection from Japanese encephalitis, and it is generally recommended for infants after birth. We hope this information is helpful to you. Wishing you good health and happiness.
