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.
Map displaying bacillus Calmette–Guérin vaccination policy by country. (A) The country currently has universal bacillus Calmette–Guérin vaccination program. (B) The country used to recommend bacillus Calmette–Guérin vaccination for everyone but currently does not. (C) The country never had universal bacillus Calmette–Guérin vaccination programs. Reprinted from ref. (4), which is licensed under CC BY 4.0.
