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In six patients there was a purulent inflammation of the pharynx, larynx and trachea. It was extensive and produced profound general symptoms, dyspnœa and profuse purulent expectoration. The lungs were clear, but the patient seemed for a time in danger of death. The condition was considered a grave complication. There was only one case of acute sinusitis, one case of antrum disease, and only four cases of middle ear infection were recognized. This is in marked contrast to other epidemics which have occurred to our knowledge in the past fifteen years or more, and which have been spoken of as influenza or “grippe.” Disease of the tonsils, middle ear disease, mastoid disease and sinus disease occurred with great frequency in those sporadic epidemics. This again seems to show that the deep respiratory tract was more generally and more severely affected in this epidemic than the upper respiratory tract.

With the exception of the pleura, the serous membranes were remarkably free from infection. Only one case of acute endocarditis, three cases of meningitis (all pneumococcic), none of pericarditis, peritonitis or arthritis were recognized among the 547 cases of influenza.