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The disease was restricted entirely to human beings,
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and that will prove to be important in making it
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eventually a good candidate for eradication.
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The name for the virus, Variola,
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derives from the Latin vriaus, meaning spotted.
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And in England the disease, in fact, was popularly called,
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as I've said, "The speckled monster."
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So, here's a picture of the smallpox virus,
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It's gone out; There it is.
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And that's a schematic image
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of a smallpox virus.
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And as I said, there is a mutation that