Page last updated at 16:15 GMT, Thursday, 20 November 2008

How bird flu has spread

You need to have Javascript enabled to view the interactive features of this map.

USING THE INTERACTIVE MAP
Information based on FAO, OIE and government sources
Figures generally refer to number of districts/provinces officially reporting outbreaks rather than exact number of cases
UK includes a case in quarantine
Countries marked * denote human cases/deaths relating to earlier periods but confirmed retrospectively
A lethal strain of bird flu has been spreading across the globe for more than four years, killing millions of birds and hundreds of humans.

However, fears of a new pandemic, which could claim millions of lives, have not been realised so far, even though the mortality rate of the disease among humans has risen above 60%.

Experts point out that cross-infection to humans is still relatively rare and usually occurs where people have been in close contact with infected birds.

But international bodies, such as the World Health Organization and the UN's Food and Agriculture Organization, have been using their knowledge and experience of outbreaks to prepare for a possible pandemic.

The big fear remains the risk of the H5N1 bird-flu strain combining with a human strain to produce a mutation that is more dangerous and difficult to combat.

This map will generally be updated at six-monthly intervals




FEATURES, VIEWS, ANALYSIS
Has China's housing bubble burst?
How the world's oldest clove tree defied an empire
Why Royal Ballet principal Sergei Polunin quit

BBC navigation

BBC © 2013 The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.

Americas Africa Europe Middle East South Asia Asia Pacific