Since 2003, bird flu has taken flight and spread around the world, from Asia to Europe, the Middle East and Africa. The WHO estimates that ever since the flu outbreak in Asia in 2003, nearly 50 countries followed suit with subsequent bird-flu outbreaks.
The virus has claimed nearly 146 lives since 2003, according to the WHO. Countries with confirmed human deaths are: Azerbaijan, Cambodia, China, Egypt, Indonesia, Iraq, Thailand, Turkey and Vietnam.
Typical symptoms of bird flu in humans show up as influenza-like symptoms, such as fever, cough, sore throat and muscle aches, to eye inflammations (conjunctivitis), pneumonia, acute respiratory distress, viral pneumonia, and other severe life-threatening complications.