smallpox virus
Noun
Meaning
the virus that causes smallpox in humans; can be used as a bioweapon
Source: WordNetSynonyms
Hypernyms
Hyponyms
Examples
It is fashionable to wax apocalyptic about the threat to humanity posed by the AIDS virus, "mad cow" disease, and many others, but I think a case can be made that faith is one of the world's great evils, comparable to the smallpox virus but harder to eradicate.
Most of the trouble in this world has been caused by folks who can't mind their own business, because they have no business of their own to mind, any more than a smallpox virus has.