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.
Persistence over 48 months of the neutralizing antibody responses against HPV 16 and HPV 18 after three doses of vaccine administered at 0, 2 and 6 months to 9–17-year-old girls. Values shown are geometric mean titers (with 95% CI bars) of 201–268 girls at each timepoint (indicated as numbers by each point).
