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.
Risk ratio of incident, 6‐mo persistent, and 12‐mo persistent infection and atypical squamous cell of undetermined significance or greater in HPV‐16/HPV‐18 type‐specific seropositive vs seronegative women. Error bars represent 95% confidence intervals; #95% confidence intervals are narrow and not visible; HPV, human papillomavirus; PI, persistent infection; bin, binary; ab, antibody; ACS‐US+, atypical squamous cell of undetermined significance or greater
