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.
A. Proportion of infants with an Avidity Index ≥ 50% to all vaccine serotypes following immunization with 23vPPV (n=53). Black bars indicate prior to immunization, grey bars indicate 2 weeks post-immunization and white bars indicate 5 months post-immunization. B. The level of significance between the proportions of infants with AI ≥ 50% between each time point.
