History of the Peloponnesian War

Strong and weak constitutions proved equally incapable of resistance, all alike being swept away, although dieted with the utmost precaution.

By far the most terrible feature in the malady was the dejection which ensued when anyone felt himself sickening, for the despair into which they instantly fell took away their power of resistance, and left them a much easier prey to the disorder; besides which, there was the awful spectacle of men dying like sheep, through having caught the infection in nursing each other. This caused the greatest mortality.