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.
Enrolled countries in the programme with number of participating laboratories, World Health Organization and National Institute for Communicable Diseases external quality assessment programme for national public health laboratories, 2011–2016.
