THE MECHANISM OF RECOVERY IN PNEUMONIA

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Abstract
In many acute infectious diseases convalescence often sets in abruptly. Within a few hours the temperature may fall several degrees, and forthwith there is a marked improvement in all the symptoms. This sudden change for the better is known as the crisis. Pneumonia, erysipelas, measles, the varioloid diseases and recurrent fever are diseases in which recovery or improvement frequently occurs by crisis. In lobar pneumonia the crisis is a most characteristic phenomenon. Here it may take place with a suddenness without parallel in other disorders. In somewhat more than one-half of the cases "after the symptoms have lasted some five to eight days, less frequently a longer or shorter time, while at a constant height or even while increasing in severity, there is a rapid fall in the temperature with copious perspiration and rapid improvement in all the symptoms." This abrupt change "from a state of extreme hazard and distress

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