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.
Opsonophagocytic antibody (OPA) titers after pneumococcal vaccination. (A) Serotype 4. (B) Serotype 6B. (C) Serotype 14. (D) Serotype 23F. Each triangle represents one study person. Horizontal bars denote the geometric mean value for each study group. Statistical comparisons have been performed for the respective patient groups versus the control group. *, P < 0.05; **, P < 0.01; ***, P < 0.001 (Mann-Whitney U test).
