Bird flu, or avian flu, is an infectious type of influenza that spreads among birds. In rare cases, it can affect humans.
There are lots of different strains of bird flu virus. Most of them don't infect humans. But there are 4 strains that have caused concern in recent years:
Although H5N1, H7N9 and H5N6 don't infect people easily and aren't usually spread from human to human, several people have been infected around the world, leading to a number of deaths. H5N8 has not infected any humans worldwide to date.
No humans have been infected with H5N1, H7N9, H5N6 or H5N8 bird flu in the UK – this includes the type of H5N6 virus recently found in humans in China. Plans are in place to manage any suspected cases.
H5N8 bird flu has been found in some wild birds and poultry in the UK. H5N6 has also been found in some wild birds in the UK but is a different strain to that seen in China.
You can read the latest bird flu updates on GOV.UK.
Bird flu is spread by close contact with an infected bird (dead or alive).
Markets where live birds are sold can also be a source of bird flu. Avoid visiting these markets if you're travelling to countries that have had an outbreak of bird flu.
You can't catch bird flu through eating fully cooked poultry or eggs, even in areas with an outbreak of bird flu.
If you're visiting a foreign country that's had an outbreak you should:
What not to do:
The seasonal flu vaccine doesn't protect against bird flu.
The main symptoms of bird flu can appear very quickly and include:
Other early symptoms may include:
It usually takes 3 to 5 days for the first symptoms to appear after you've been infected.
Getting treatment quickly, using antiviral medicine, may prevent complications and reduce the risk of developing severe illness.
Call a GP or NHS 111 if you experience any symptoms of bird flu and have visited an area affected by bird flu in the past 10 days.
Your symptoms can be checked over the phone.
Get medical help straight away if you get the symptoms of bird flu.
Contact your travel insurance company if you need advice about where to get help.
Tell the doctor if you have:
These tests can be done to confirm bird flu:
If the tests are normal, it's unlikely you have bird flu.
If it's thought you might have symptoms of bird flu you'll be advised to stay at home, or you'll be cared for in hospital in isolation from other patients.
You may be given an antiviral medicine such as oseltamivir (Tamiflu) or zanamivir (Relenza).
Antiviral medicines help reduce the severity of the condition, prevent complications and improve the chances of survival.
They are also sometimes given to people who have been in close contact with infected birds, or those who have had contact with infected people, for example family or healthcare staff.
Bird flu is a notifiable disease in animals, so you should report any suspected case in animals to the Animal and Plant Health Agency (APHA), even if you're not sure.
Call the Department for Environment, Food and Rural Affairs (Defra) helpline on 03459 33 55 77 if you find dead wild birds.
To prevent infection it is important not to touch or pick up any dead or visibly sick birds that you find.
You can read more about notifiable diseases in animals and how to spot bird flu and what to do if you suspect it on the GOV.UK website.