The death rate of infants from 7 days to 1 year of age, in the United States registration area, has been reduced 53 per cent during the years 1916 to 1934 inclusive. During the same time the death rate of infants under 7 days of age has been reduced only 10 per cent.1 In order that infant mortality may be further materially reduced, the chief effort must be to prevent deaths under 2 weeks of age and particularly to prevent those that occur during the first few days of life. Before such an effort can be successful, the causes of early infant deaths must be accurately determined. When the actual causes of infant deaths are known, measures can be more effectively devised to prevent them.
The number of infant deaths under 7 days of age has not been reduced to a greater extent because little has been generally known