FIG. 1.
PPDj-specific IgG antibody in plasma samples, as detected by ELISA. The mean is indicated by a black bar. Cntl, control group; As, asymptomatic group; **, P < 0.01.
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.