Hippocrates, De morbis popularibus
W. H. S. Jones, Ed.

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PART 22

XXII. During winter, near the time of the winter solstice, and continuing until the equinox, the ardent fevers and the phrenitis still caused many deaths, but their crises changed. Most cases had a crisis on the fifth day from the outset, then intermitted four days, relapsed, had a crisis on the fifth day after the relapse, that is, after thirteen days altogether. Mostly children experienced crises thus, but older people did so too. Some had a crisis

[p. 181] on the eleventh day, a relapse on the fourteenth, and a complete crisis on the twentieth. But if rigor came on about the twentieth day the crisis came on the fortieth. Most had rigors near the first crisis, and those who had rigors at first near the crisis, had rigors again in the relapses at the time of the crisis. Fewest experienced rigors in the spring, more in summer, more still in autumn, but by far the most during winter. But the hemorrhages tended to cease.