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A virus is parasitic, it invades cells and uses the chemical content of the cell to reproduce more of itself, killing the cell in the process. When a virus invades an organism such as a person, the organism gets sick. Viral disease can be very serious, even fatal.

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Q: How can a virus cause harm?
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Viruses are designed to harm the computer. These no such thing as a virus that does not cause harm to computers. If your virus scanner detected a virus, the damage is already done.


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