Vaccine for Japanese Encephalitis (JE)

Japanese encephalitis (JE) is a viral infection transmitted by mosquitoes, primarily affecting rural areas in Asia and parts of the western Pacific. While most infections are asymptomatic or mild, less than 1% of cases progress to severe encephalitis (brain inflammation), which can be devastating. Among those with encephalitis, approximately 20–30% die, and 30–50% of survivors experience lasting neurological, cognitive, or behavioural issues.

For Canadian travellers, the risk of JE varies based on destination, duration of stay, and activities. Vaccination can be expensive, requiring two doses over the course of 1 or 4 weeks, with boosters at 1 and 10 years. Consulting with a travel pharmacist is recommended to assess the need for vaccination, especially if travelling to rural areas during JE transmission seasons. Preventive measures also include using mosquito repellents, wearing protective clothing, and ensuring accommodations are equipped with proper mosquito netting or screens.