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.
Dot plot of individual results of the tuberculin skin test and QuantiFERON-TB Gold In-Tube (QFT-GIT) of subjects. The dashed line represents the cutoff of 0.35 IU/mL for interferon-gamma. All points below zero among the QTF-GIT results in this figure have been assigned a value of zero.
