Wait, what? Are you limiting that to people who work in an area where they might possibly come into contact with it? Because otherwise you might find it fun to ask the next hundred people you meet what "variola" is.
I assume that the CDC/FDA/NIH have more stringent protocol in place.
OFFICIALS at the Centers for Disease Control and Prevention recently discovered that at least 75 workers there had been exposed to possible anthrax infection.
and
Based on current reports, the problem arose when anthrax — incorrectly thought to be dead — was removed from the high-containment lab and exposed people who had no knowledge that they were in contact with live bacteria.
from
http://www.nytimes.com/2014/06/30/opinion/anthrax-thats-not-...