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.
* This study included 5,144 cervical swab samples from 548 women assigned to the placebo group of a HPV16/18 vaccine trial, which is a subset of the total amount of clinical materials tested during this trial.
