History of the Peloponnesian War

Thucydides

Thucydides, Vol. 1-4. Smith, Charles Foster, translator. London and Cambridge, MA: Heinemann and Harvard University Press, 1919-1923.

and no constitution, as it proved, was of itself sufficient against it, whether as regards physical strength or weakness,[*](i.e. no constitution was of itself strong enough to resist or weak enough to escape the attacks (Jowett).) but it carried off all without distinction, even those tended with all medical care.

And the most dreadful thing about the whole malady was not only the despondency of the victims, when they once became aware that they were sick, for their minds straightway yielded to despair and they gave themselves up for lost instead of resisting, but also the fact that they became infected by nursing one another and died like sheep. And this caused the heaviest mortality; for if, on the one hand, they were restrained by fear from visiting one another, the sick perished uncared for, so that many houses were left empty through lack of anyone to do the nursing;