What is the reason for a two-year-old baby having a fever after receiving a vaccine?

Patient's question:

The baby is two and three months old. They got vaccinated the day before yesterday and started fevering this morning. It's a high fever, almost 40 degrees Celsius. They took a fever reducer in the morning, but after five hours, the fever returned. What's going on? They received the DTP and Japanese encephalitis vaccines. Should they go to the hospital?

Doctor's answer:

Seeing your situation, I am happy to provide you with clarification and assistance. Fever after getting vaccinated may be related to the vaccination. It is recommended to give your child more water, and if the temperature is below 38.5°C, you can give fever-reducing medication. If the fever recurs within three days, it is necessary to go to the hospital for a thorough examination. The above suggestions are for the question "Why did my two-year-old and three-month-old child have a fever after getting vaccinated?" I hope this is helpful to you. Wishing you good health!

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