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.
[Group portrait of public health service workers (?) standing in front of the United States Public Health Marine Hospital Service Headquarters, Fourth Provisional Plague District, San Francisco, Calif.]
[Group portrait of public health service workers (?) standing in front of the United States Public Health Marine Hospital Service Headquarters, Fourth Provisional Plague District, San Francisco, Calif.]