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.
Correlation between N. meningitidis serogroup-specific IgG concentration and serum bactericidal titer. Sera were collected prior to and approximately 30 days after administration of a fourth immunization dose (booster dose given at 12 to 15 months of age) to toddlers, following completion of a primary immunization series as infants (immunized at 2, 4, and 6 months of age). Forty-eight pre- and postimmunization sera were analyzed.
