Hungarian Prime Minister Ferenc Gyurcsany (R) and Lajos Tekes (L), director of the National Animal Health Institute look at dead swans undergoing dissection in Budapest on February 16, 2006. The dissected swans most probably died of bowel infection, but other swans found in southern Hungary have already tested positive for the H5 avian influenza virus and samples from those birds are now being tested to determine whether they had the H5N1 strain which can kill humans. REUTERS/Karoly Arvai