Human pandemics of influenza in 20th century were 1918: "Spanish Flu"- 40 million deaths; 1957: "Asian Flu"- 1-2 million deaths and 1968: "Hong Kong Flu"- 7 million deaths.Avian influenza, commonly known as bird flu, one of the most serious health threats today, is an infectious disease of birds caused by influenza virus type A. It has imposed serious threat for the growing poultry industry of Bangladesh with a risk of affecting humans. Domestic poultry are highly vulnerable. In its highly pathogenic form, the disease is extremely contagious and mortality in poultry can approach 100%.Avian...