...the States in sanitary matters, to prevent the introduction and spread of contagions and infections diseases from foreign countries into the United States...officer or board within or near the locality where his provisions of this act, and any rules or regulations made in pursuance thereof." — Medical Record....

...under laws of the States, in sanitary matters, to prevent the introduction and spread of contagious and infectious diseases from foreign countries into...intercourse, or upon and along the lines of inter-State tracts and travel." In times of emergency, said Board of Health may lawfully confer upon any such local...