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en.wikipedia.org/wiki/Virus

A virus is a small infectious agent that replicates only inside the living cells of other organisms. Viruses can infect all types of life forms, from animals and plants  ...

www.news-medical.net/health/What-is-a-Virus.aspx

A virus is a small infectious agent that can only replicate inside the cells of another organism. The word is from the Latin ''virus'' referring to poison and other  ...

virusintl.com

VIRUS Performance apparel - Official VIRUS Store. Enhanced fabrics, compression and athletic clothing for both men and women. Free Shipping on orders over ...

www.dictionary.com/browse/virus

Virus definition, an ultramicroscopic (20 to 300 nm in diameter), metabolically inert, infectious agent that replicates only within the cells of living hosts, mainly ...

www.britannica.com/science/virus

Sep 13, 2017 ... virus: Virus, an infectious agent of small size and simple composition that can multiply only in living cells of animals, plants, or bacteria.

medlineplus.gov/viralinfections.html

Oct 3, 2017 ... Viruses cause familiar infections such as the common cold, but they also cause severe illnesses. Learn more about viral infections and their ...

eol.org/info/458

A virus is a microscopic organism that can replicate only inside the cells of a host organism. Most viruses are so tiny they are only observable with at least a ...

searchsecurity.techtarget.com/definition/virus

A computer virus is malicious code that replicates by copying itself to another program, computer boot sector or document and changes how a computer works.

www.ucmp.berkeley.edu/alllife/virus.html

Viruses depend on the host cells that they infect to reproduce. When found outside of host cells, viruses exist as a protein coat or capsid, sometimes enclosed ...