What is it?
Although most people who are infected with Japanese encephalitis are asymptomatic, it is still a dangerous disease. The symptoms of Japanese encephalitis are headache, fever, vomiting, seizures, and encephalitis (brain swelling), which can be deadly.
This vaccine is not recommended as a routine vaccine (in the US), but it may be recommended if you are traveling to a location with Japanese encephalitis.
Areas With Japanese Encephalitis
Map from the World Health Organization
This vaccine uses inactivated Japanese Encephalitis virus as the active ingredient.
Note: there may be trace amounts of DNA and proteins from the cells used to grow the virus for this vaccine.
Ingredient amounts based on a 0.5mL dose
Asymptomatic: does not have symptoms or does not appear sick
Encephalitis: Inflammation (swelling) of the brain
Seizures: A sudden burst of electrical activity in the brain that can affect movement and behavior
Package insert: https://www.fda.gov/media/75777/download
Aluminum Hydroxide: https://medlineplus.gov/druginfo/meds/a601013.html
Bovine serum albumin:
Last updated: Feb. 12, 2023