Official websites use .gov A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
At The Gates: Our safety depends upon official vigilance
At The Gates: Our safety depends upon official vigilance
The specters of cholera, yellow fever, and smallpox recoil in fear as their way through the Port of New York is blocked by a barrier on which is written "quarantine" and by an angel holding a sword and shield on which is written "cleanliness."
Copyright:
The National Library of Medicine believes this item to be in the public domain. (More information)