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.
Memorandum on cholera: adopted at a medical conference held in the Bureau of Agriculture, in March 1866
Memorandum on cholera: adopted at a medical conference held in the Bureau of Agriculture, in March 1866