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Picture | |
from | Encarta |  |
Smallpox Viruses |
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| A colored-transmission electron micrograph shows a group of Orthopoxvirus variola, the virus that causes smallpox. Once greatly feared for its ability to kill or disable its victims, smallpox was eradicated by 1979 through a worldwide vaccination campaign. | ||||||
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| Alfred Pasiek/Science Source/Photo Researchers, Inc. | ||||||
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| Appears in these articles: | ||||||
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| Virus (life science) | ||||||
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