How many days does fever last after Japanese encephalitis vaccination?
Disease description:
The child received the Japanese encephalitis vaccine this morning and developed a mild fever upon returning home. How many days does it typically take for the fever caused by the Japanese encephalitis vaccine to subside?
Doctor's answer (1)
Dr. Zhang Weiling
Fever following Japanese encephalitis vaccination typically subsides within 3–5 days. After administration, the vaccine triggers an immune defense response, during which fever is a common side effect. This fever usually lasts for 3–5 days, and most individuals begin to feel progressively better by day 5. However, if the fever persists beyond 5 days, prompt medical evaluation at a qualified healthcare facility is recommended. Additionally, patients should increase fluid intake and ensure adequate rest to support faster recovery.
