They were followed in 1923 by 1.000.000 more from the agrarian population. It has become the duty of the health service in the cities to preserve efficiently the purity of our food and water supply generally and to prevent rather than cure disease. Broadly speaking. the duties of the Federal health service are to prevent disease from entering the country. either brought through immigration and commerce and from spreading from one State to another. to suppress epidemics. investigate disease. and disseminate health information. The most important of these tasks is the prevention of disease from entering the country and from spreading through it. Exclusion of disease through foreign quarantine was once entirely in the hands of the States but has gradually been surrendered by them to the Federal authorities. who. in the nature of things. are much better equipped to manage it.
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immigration