Influenza H5N1 and its relation with human

Abstract

Ancestors of the H5N1 bird flu viruses emerged in southern China in 1996, and caused large poultry outbreaks in Hong Kong in 1997, which resulted in 18 human infections. The bird outbreak was controlled, but H5N1 bird flu viruses re-surfaced in 2003 to spread widely in birds throughout Asia, and later in Africa, Europe, and the Middle East, causing poultry outbreaks and human infections