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Encephalitis International

Preventing future encephalitis campaign

This World Immunization Week (24th – 30th April), Encephalitis International aims to raise both the public and healthcare professional understanding of the impact of climate change on infectious causes of encephalitis.

This campaign will focus on key vaccine-preventable/protective causes, along with other causes of encephalitis that would benefit from greater vaccine investment.

We highlight nine specific pathogens that cause encephalitis: Japanese encephalitis (JE), Influenza, Measles, mumps, rubella (MMR), Chikungunya, Oropouche, Dengue and West Nile Virus.

What is encephalitis?

Encephalitis is an inflammation of the brain. It is caused either by an infection invading the brain (infectious encephalitis) or through the immune system attacking the brain in error (post-infectious or autoimmune encephalitis).

1.5M

People are affected by encephalitis globally each year

78%

of people across the world do not know what encephalitis is

224M

People reached during our 2024 World Encephalitis Day campaign

Your Stories

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West Nile Virus Encephalitis Lived Experience - Sue Ann

Sue Ann who was diagnosed with West Nile Virus encephalitis in 2023. In this special encephalitis podcast episode, she shares her lived experience story with our Chief Medical Writer, Prav.

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Japanese Encephalitis Lived Experience - Kelly's Story

Kelly, from Canada, shares her story of Japanese encephalitis which acquired while travelling. Her story formed part of the Encephalitis International Vaccine-preventable encephalitis awareness campaign in 2024.

Read Story

Anti-NMDAR Encephalitis Lived Experience - Megan's Story

It started with neurological symptoms such as difficulty processing information (forgetting song lyrics and inability to write emails) as well as visual symptoms (losing colours and pixelated vision) and paranoia. I also could not feel emotions or pain. After admission to the hospital, these symptoms worsened (inability to understand or process anything, couldn’t eat or use bathroom). Things then progressed to constant seizures.

Read Story

One person is diagnosed with encephalitis every minute.

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The above number reflects how many people have been diagnosed so far this year.
Support us so they don’t have to face that diagnosis alone.

Donate

Make a donation today

One person is diagnosed with encephalitis every minute, and life for them and their family will never be the same again. Make a donation today and help us build a world without death and disability from encephalitis.

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Upcoming Events

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My Brain My Story 2025

Please note My Brain : My Story is a hybrid event (in-person and virtual via Zoom) We would love you to join us in York, England, – or virtually – at My Brain : My Story on Saturday 4 October 2025. This event is a hybrid event for anyone who wants to listen to the […]

4 October 2025
The Grand, Station Rise, York, YO1 6JD
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Encephalitis 2025 - Registration

3rd and 4th December 2025 Royal College of Physicians, London and virtually Registrations are now open! (in-person and virtual tickets are available) Book your tickets here ENCEPHALITIS 2025 is an excellent forum for physicians, scientists, researchers, and healthcare professionals to exchange ideas, knowledge and clinical experience relating to encephalitis. You can join us in-person at […]

3 - 4 December 2025
Hybrid
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Page Created: 3 October 2023
Last Modified: 24 April 2025
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