An Overview of the Highly Pathogenic H5N1 Influenza Virus. The influenza or flu which is caused by influenza virus has a history of thousands of years. This ball-like enveloped virus contains eight or seven single stranded negative-sensed RNA ranging from 890 to 2,341 nucleotides that encode 11 to 12
proteins. Influenza used to cause quite a few high morbidity pandemics in both animals and human beings. Its’ ability to transmit between species, and so as the high mutation rate made it difficult for us to fight with it. Annually, we suffer from this virus, but no effective way to control it has been found yet. Researches on the virus never stop, but knowledge about it is still far from enough, and we still have a long way to go.