Our human body is very susceptible to common sickness such as colds, cough, irritation and all are caused by a virus. A virus enters the human body through the different holes and openings and attached itself to a host cell. It releases certain genetic information to a cell and recruits other cells for greater destruction. On the other hand, there are high breed viruses which does not need a hole or an opening from a body to destruct, it just find some weakness points from the human host and there it enters and propagates itself very fast.

How does a computer virus simulate a biological virus? Just as a biological virus injects its own genetic information into a cell and interferes with the body’s normal operations, a computer virus is a program written to interfere with the proper functioning of a computer. It may damage programs, delete files, reformat hard disks and perform other forms of destructive acts.

To be classified as a virus, a program must meet two criteria. It must be able to execute itself by placing its own code in the execution path of another program. The program must also be able to replicate itself by replacing existing computer files with copies of the virus-infected files. Similar to the way a biological virus requires a host cell, a computer virus requires an infected host file to propagate itself.