FIG 1.
Proposed framework for considering tuberculosis infection as a spectrum. (Reproduced from reference 2 by permission from Macmillan Publishers Ltd.)
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.