Cross species influenza: emerging zoonosis.

Emerging infection is usually an important public health concern. Within the past decade, there are many new emerging infectious diseases. An important concern is on the pandemic of those new emerging infections. The cross species infection from animal to human, zoonosis, is usually problematic and hard to manage. The well-known situations are on new emerging atypical influenza infections. In this brief article, the author discuss on three important cross species emerging influenza, H5N1 bird flu, H1N1 swine flu and H7N9 bird flu. The basic details of those new influenzas genetic aberration and the concept for surveillance and prediction of new mutation that result in the new cross species emerging zoonosis are also mentioned in this article.