Mohammed Mujahid and Farah Ghani
It has been more than a century since the famous Dutch microbiologist Beijerinck submitted his paper on the cause of tobacco mosaic which leads to discovery of virus and the concept of Virology. There are about 219 virus species that infect humans and more 200 plant viruses and animal virus and This paper marked to understand beginning of a far-reaching change for to understand the pathogenicity of a newly emerge virus and led to eventually in understand the genetic nature of the virus of an every newly emerge viruses. Still there is a question mark for every scientist or newly emerge naïve researcher that we have been failing to understand the genetic nature of virus. It has seen that nearly about 15-20 viruses are emerging now and then. In view of the presumed that obligative parasite they call viruses as the greatest caution must be exerted in attributing to anyone virus a property observed in this consider each virus as a completely distinct entity, un-related to any others.
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