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.
Density of concurrent colonizing pneumococcal serotypes between PCV7-vaccinated and PCV-unvaccinated children who were 9 months old (A) and 16 months old (B), grouped by first, second, third, and fourth colonizing serotype as determined by density of carriage.
