EXPERIMENTAL TRANSMISSION OF MINOR RESPIRATORY ILLNESS TO HUMAN VOLUNTEERS BY FILTER-PASSING AGENTS. I. DEMONSTRATION OF TWO TYPES OF ILLNESS CHARACTERIZED BY LONG AND SHORT INCUBATION PERIODS AND DIFFERENT CLINICAL FEATURES

^{Respiratory Diseases Commission Laboratory, Regional Hospital, Fort Bragg, N. C. 3}

Members and professional associates of the Commission on Acute Respiratory Diseases were: John H. Dingle, Lt. Col., M.C., A.U.S., Director; Theodore J. Abernethy, Lt. Col., M.C., A.U.S.; George F. Badger, Major, M.C., A.U.S.; Joseph W. Beard, M.D.; Norman L. Cressy, Major, M.C., A.U.S.; A. E. Feller, M. D.; Irving Gordon, M.D.; Alexander D. Langmuir, Major, M.C., A.U.S.; Charles H. Rammelkamp, Jr., M.D.; Elias Strauss, Major, M.C., A.U.S.

This investigation was supported through the Commission on Acute Respiratory Diseases, Board for the Investigation and Control of Influenza and Other Epidemic Diseases in the Army, Preventive Medicine Service, Office of the Surgeon General, United States Army, and by grants from the Commonwealth Fund, the W. K. Kellogg Foundation, the John and Mary R. Markle Foundation, and the International Health Division of the Rockefeller Foundation, to the Board for the Investigation and Control of Influenza and Other Epidemic Diseases, for the Commission on Acute Respiratory Diseases.

Now located in the Department of Preventive Medicine, School of Medicine, Western Reserve University, Cleveland, Ohio.