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Of the group without lung involvement nothing further would seem necessary to be said in addition to what one finds in standard text-books describing the disease picture of former epidemics. The incidence of influenza of this type among our group was as follows: Of 153 soldiers 93, or about 60 per cent., had a so-called simple, uncomplicated influenza, and of the 394 civilians 185, or about 52 per cent., had no lung involvement. There are a few points in which the symptoms of the present epidemic seem to be so peculiar that they merit special consideration.

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This can be described as showing a sudden rise to 102–104, at which point it is maintained for a few days, and subsides by lysis in a few days more. A typical chart is as follows:

CHART I

Or the temperature might fall one or two degrees for a day or so after the first rise, and then go up again for one or two more days, and subside by lysis as is shown in Chart II.