Keyword Analysis & Research: virus

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What are viruses and how do they work?

Viruses are very simple microbes, they can't do much by themselves. Viruses need a host, another living organism that gives them everything they need to work. Viruses take any chance they can to find a host. They get inside the host's cells and take it over.

What is a virus simple definition?

A virus is a microscopic parasite which can infect living organisms and cause disease. It can make copies of itself inside another organisms cells. Viruses consist of nucleic acid + a protein coat. Usually the nucleic acid is RNA; sometimes it is DNA.

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