A chronological look at the spead of bird flu...
January 18th: International donors pledge $1.9 billion to combat the spread of bird flu at the end of a conference in Beijing.
February 8th: The first African cases of the deadly H5N1 strain are detected in poultry in the northern Nigerian states of Kano, Kaduna and Plateau.
February 11/12th: Italy says six wild swans found in Sicily and on the southern mainland have tested positive for H5N1. In Greece, three swans found south of Thessaloniki test positive for H5N1. These are the first known cases of the deadly strain in the EU.
February 14th: Iran and Austria report cases of H5N1.
February 15th: Germany confirms two dead swans found on the Baltic island of Ruegen were infected with H5N1. More than 100 wild birds have since tested positive for H5N1.
February 17th: Egypt finds its first cases of H5N1 in chickens.
February 18th: India announces its first cases of H5N1, finding the virus in poultry in a western state.
February 22nd: The EU approves plans by France and the Netherlands to vaccinate millions of hens, ducks and geese.
February 25th: France confirms H5N1 at a farm in the east where thousands of turkeys have died. It is the first case of the virus in domestic farm birds in the EU.
February 27th: Domestic ducks from Niger test positive for H5N1.
March 6th: Poland confirms two dead swans had H5N1.
March 16th: Afghanistan, Myanmar and Denmark confirm their first cases of H5N1 in birds. The next day Israel confirms its first cases.
March 21st: Pakistan becomes the latest country to confirm bird flu, with H5N1 reported in two poultry flocks at farms in the North West Frontier province.
March 24th: Jordan confirms H5N1 after at least three dead turkeys at a domestic farm in Ajloun tested positive.
April 4th: Burkina Faso detects H5N1 in poultry near its capital Ouagadougou, making it the fifth African nation to report the disease after Nigeria, Niger, Egypt and Cameroon.
April 6th: WHO confirms death of a boy in Cambodia. The global toll stands at 109, with four victims in Turkey, 23 in Indonesia, six in Cambodia, 11 in China, 14 in Thailand, 42 in Vietnam, two in Iraq, five in Azerbaijan and two in Egypt.
April 6th: Britain confirms H5N1 in a mute swan in Scotland. Carcases of six dead birds found in Antrim and Down sent for testing.
WHO death toll
Turkey 4
Indonesia 23
Cambodia 6
China 11
Thailand 14
Vietnam 42
Iraq 2
Azerbaijan 5
Egypt 2
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Total 109