Bird flu refers to an illness caused to a particular host caused be any of species of influenza virus. This bird flu is also called as Avian Influenza in which birds are affected by a particular influenza A virus. It is usually spread from bird to bird. Bird flu is technically caused by H5N1 and H7N9 bird flu viruses. This influenza virus attacks the birds and when humans consume them, they will be affected by this virus, where humans do not have any immunity against the virus and so causes severe effects.
Prevention: There is no treatment for bird flu and the virus is most effective to humans and so prevention can only be done by taking certain precautionary measures like will preferring birds as a source of food better to check them whether they are affected by any virus or not.
The epidemiological investigation is ongoing. The first time H5N1 occurred in Israel was in March 2006 revealing 9 outbreaks. Since then, all the outbreaks that occurred in commercial flocks were also in March (2011, 2012) except one outbreak that took place in January 2010, in the same region of the Aviel's outbreak (distance of 10 kilometers). The disease had been also diagnosed in a kindergarden’s minizoo at the end of December 2007, 3 kilometers from the Aviel's outbreak. This area has numerous water ponds with water birds wintering in them. Backyard birds in the village have also been culled. A few days later, two additional outbreaks have been diagnosed in the same region as described in the report. The culling of the flocks has been terminated.