HPV Vaccination in Special Risk Groups: 5 Year Follow-up

In 2007-2009 the investigators conducted a study to determine the immunogenicity response to HPV vaccine in special risk patients known to be at increased risk of abnormal cervical cytology. The serological response to the vaccine was measured 1 month post the third and final dose (n=70) finding a robust response overall. The aim of this follow-on study is to provide data on the long-term protection offered by the HPV vaccination. The persistence of antibody 5 years post immunisation is unknown and the impact on cervical cytology abnormalities in these special risk groups is important. The study results will help inform national immunisation program recommendations re- booster HPV vaccine doses.