What Are the Side Effects of the Japanese Encephalitis Vaccine?

The Japanese encephalitis vaccine may cause side effects such as fever, and redness, swelling, warmth, or pain at the injection site. This vaccine effectively prevents Japanese encephalitis and also reduces the risk of neurological sequelae associated with the disease. After vaccination, some individuals may experience fever and localized reactions—including redness, swelling, warmth, and tenderness at the injection site. These symptoms are typically mild and resolve gradually over time; therefore, there is generally no need for excessive concern.