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An official letter on bird flu is seen at a butcher's shop window in Istanbul, Turkey, October 14, 2005. Bird flu was detected after 1,800 turkeys died on a farm in the western village of Kiziksa, 80 miles southwest of Istanbul. An EU official confirmed that the disease was the H5N1 virus, which scientists worry might mutate into a human virus and spark a pandemic. (AP/Murad Sezer)
An official letter on bird flu is seen at a butcher's shop window in Istanbul, Turkey, October 14, 2005. Bird flu was detected after 1,800 turkeys died on a farm in the western village of Kiziksa, 80 miles southwest of Istanbul. An EU official confirmed that the disease was the H5N1 virus, which scientists worry might mutate into a human virus and spark a pandemic. (AP/Murad Sezer)