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.
| Original language | English |
|---|---|
| Journal | Vaccine |
| Volume | 26 |
| Issue number | 52 |
| Pages (from-to) | 6844-51 |
| Number of pages | 8 |
| ISSN | 0264-410X |
| DOIs | |
| Publication status | Published - 9 Dec 2008 |
| Externally published | Yes |
Keywords
- Adolescent
- Antibodies, Viral/analysis
- Condylomata Acuminata/epidemiology
- Female
- Follow-Up Studies
- Human papillomavirus 11/immunology
- Human papillomavirus 16/immunology
- Human papillomavirus 18/immunology
- Human papillomavirus 6/immunology
- Humans
- Immunization Schedule
- Papanicolaou Test
- Papillomavirus Infections/immunology
- Papillomavirus Vaccines/immunology
- Reverse Transcriptase Polymerase Chain Reaction
- Vagina/pathology
- Vaginal Smears
- Vulva/pathology
- Young Adult
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