Recurrence occurs more commonly in pneumonia than in any other acute infectious disease. The incidence of one or more previous attacks has been noted by various writers as from 13.61 to 41 per cent.2 Repeated attacks in the same case are not unusual. Cases in which there were from ten3 to twenty-eight4 attacks have been reported. Of the cases cited by Cole,4 thirty gave a history of more than one previous attack of pneumonia. In eighteen of these there were two previous attacks, in nine there were three, in two there were four and in one there were eighteen. The interval between recurrences is significant. In Cole's series 107 patients had only one previous attack and in only nine of these it had occurred within one year. In thirty-eight the initial attack had occurred from one to five years before, in nineteen from five to ten years earlier, in twenty-five from ten to twenty years previously and in sixteen more than twenty years before. In a carefully studied series of
BIGG E, HARVEY RA. CONSECUTIVE ATTACKS OF PNEUMOCOCCIC PNEUMONIA: REPORT OF A CASE EXHIBITING FOUR RELAPSES DUE TO FOUR PNEUMOCOCCUS TYPES. JAMA. 1941;116(9):815–817. doi:10.1001/jama.1941.02820090015003
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