Sorry, we don't allow throughout history questions. These tend to produce threads which are collections of trivia, not the in-depth discussions about a particular topic we're looking for. If you have a specific question about a historical event or period or person, please feel free to re-compose your question and submit it again.
Or, like, anything from here: http://en.wikipedia.org/wiki/List_of_historical_plagues
DISCLAIMER: I know wikipedia isn't usually acceptable for an answer but OP hasn't asked for anything that requires sourcing, to my mind.