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Vaccine. 2008 Dec 9;26(52):6844-51. doi: 10.1016/j.vaccine.2008.09.073. Epub 2008 Oct 16.

HPV antibody levels and clinical efficacy following administration of a prophylactic quadrivalent HPV vaccine.

Author information

1
Department of Gynecology and Obstetrics, Medical University of Vienna, Vienna, Austria. elmar.joura@meduniwien.ac.at

Abstract

The efficacy of the quadrivalent Human Papillomavirus (HPV) vaccine is thought to be mediated by humoral immunity. We evaluated the correlation between quadrivalent HPV vaccine-induced serum anti-HPV responses and efficacy. 17,622 women were vaccinated at day 1, and months 2 and 6. At day 1 and at 6-12 months intervals for up to 48 months, subjects underwent Papanicolaou and genital HPV testing. No immune correlate of protection could be found due to low number of cases. Although 40% of vaccine subjects were anti-HPV 18 seronegative at end-of-study, efficacy against HPV 18-related disease remained high (98.4%; 95% CI: 90.5-100.0) despite high attack rates in the placebo group. These results suggest vaccine-induced protection via immune memory, or lower than detectable HPV 18 antibody titers.

PMID:
18930097
DOI:
10.1016/j.vaccine.2008.09.073
[Indexed for MEDLINE]

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