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from | Encarta |  |
Viruses |
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| Viruses are parasites that can reproduce only within a host cell. Outside of a host cell, a virus is an inert particle. Inside a cell, a virus can replicate many times, creating thousands of viruses that leave the cell to find host cells of their own. Viruses that cause disease do so by destroying or damaging cells as they leave them. | ||||||
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| © Microsoft Corporation. All Rights Reserved. | ||||||
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| Appears in these articles: | ||||||
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| Parasite; Virus (life science) | ||||||
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