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.
Pneumococcal serotype colonization, by proportion of total isolates in each time period. Light gray lines show detected serotypes as a proportion of all isolates from that year, with a single serotype highlighted in color (green = vaccine type; blue = nonvaccine type; red = nontypeable [NT]). The vertical black dashed line represents 13-valent pneumococcal conjugate vaccine introduction.
