[rubinelli]

Nope. The world didn't keep a control group for smallpox, even in the most distant villages. We simply eradicated it.

[rpmisms]

Smallpox wasn't eradicated by the vaccine. It wore itself out, and the (incredibly simple) vaccine helped a bit.

[hilbert42]

Veritably factual evidence please. Now, ASAP.

With a claim of that magnitude you shouldn't need to look far, as you'd be able to spot the evidence from afar no matter what direction you looked.