We Will Never Forget - Chester Zoo

We will never forget

EEHV is a deadly virus that affects young elephants globally.

Now it's time to ACT FOR ELEPHANTS.

Donate now

Fundraise to save elephants

We can all make a difference to endangered elephants.

Join the fight now to support invaluable research and help us put a stop to this devastating virus.

  • £5 buys 10 swabs which we use to take saliva samples from elephants in EEHV research
  • £25 covers one weekly test for elephant calf Nandita to check for the virus 
  • £1500 provides anti-viral medicine to treat one elephant with EEHV for one day (one elephant is likely to need anti-viral medicine for at least 1-2 weeks!)

Join the fight today

Donate now, or download your fundraising pack and get started today. It's full of ele-fantastic ideas and tips that will help you join the fight against EEHV and fundraise for us. You can find our fundraising FAQs here too.

Or join us on Sunday 12 August for our very own sponsored walk around the zoo to raise money for the Never Forget campaign. Find out more here.

Find out more about EEHV below.


Elephants at Chester Zoo
Bala and Hari

Elephant endotheliotropic herpesvirus (EEHV) is a deadly virus which affects young elephants typically around weaning age. We've lost five young elephants to EEHV, most recently female calf Bala, followed just six weeks later by playmate Hari just before his third birthday.

This was devastating, not only for the family of elephants who mourned their loss, but also for the keeping and veterinary staff who had been working so hard to save the youngsters.

By donating to support research into EEHV you can help us to secure a future for young elephants by enabling us to contribute more to vital research into this killer condition.

If we don’t stop this lethal disease more young elephants will die.

Bala - Elephant Calf at Chester Zoo
Elephant calf Bala

In many elephants it can lie dormant and undetectable and never develops into the disease but others are susceptible to it – currently no one knows why some elephants get it and others don’t.

We're part of the global conservation community committed to researching EEHV and finding ways of improving outcomes for elephants that develop the virus. Ultimately we want to try and develop a preventative vaccine as, currently, there isn’t one.

For many years we’ve funded vital research into EEHV but researchers have yet to be able to culture the virus which is necessary to create a vaccine and determine what drugs are most effective. At present, drug treatment is effective in only around one-third of cases and survival rates overall are around 20%.

Hari - Elephant Calf at Chester Zoo
Elephant calf Hari

We have a responsibility to do everything we can to understand this disease in order to have a chance of eradicating it, both in zoos and, crucially, in the wild. Asian elephants are endangered and it’s hoped that the work being done in zoos will hold the key to unlocking the information researchers need to make a positive breakthrough.

You can find answers to some of the more commonly asked questions about EEHV here.

We'll never forget the elephants that we've lost but by donating to support research into EEHV you can help us secure a future for young elephants. Without more vital research into this killer condition more young elephants will die.

Donate now

Fundraise to save elephants