Renewed interest in the problems connected with measles has been steadily increasing in the past ten years. It may be said to have begun with the inconspicuous publication by Nicolle and Conseil1 in 1918. In the past five or six years particularly, there have appeared numerous reports on the results with convalescent serum and many studies dealing with researches on the etiology and on the production of prophylactic and therapeutic serums. At the same time, epidemiologists have been pointing out that the general measures used in the effort to control epidemic diseases have been of little avail in measles, and they have emphasized the need of administrative methods based on the exact knowledge of the natural history of the disease.2
During the measles epidemic in Syracuse extending from 1926 to 1928, more than 8,000 cases were reported. In anticipation of this outbreak a plan was worked out at