I can't put my finger on a site I had about the epidemics and natural disasters throughout history, but a wonderful and quick read all might enjoy for a general overview of history is "In the Wake of the Plague" by Norman F. Cantor. This was a fascinating book--the consquences of the plague were unbelievably far reaching, influencing art and culture in ways you would not think of. It was so good, I want to read it again. Nancy