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Clinical Trial Details — Status: Active, not recruiting

Administrative data

NCT number NCT00092534
Other study ID # V501-015
Secondary ID 2004_082V501-015
Status Active, not recruiting
Phase Phase 3
First received
Last updated
Start date June 14, 2002
Est. completion date March 3, 2025

Study information

Verified date August 2022
Source Merck Sharp & Dohme LLC
Contact n/a
Is FDA regulated No
Health authority
Study type Interventional

Clinical Trial Summary

The primary purpose of the study is to determine if GARDASIL™ (V501) is able to prevent cervical cancer.


Description:

In the 4-year Base Study (V501-015) (NCT00092534), participants were randomized in a 1:1 order to receive 3 doses of GARDASIL™ or matching placebo at Day 1, Month 2, and Month 6 and were assessed for efficacy, immunogenicity, and safety. In the Base Study Extension (EXT) [V501-015-10], participants who received placebo or only 1 dose of GARDASIL™ in the Base Study, were given 3 doses of open-label GARDASIL™ at EXT Day 1, EXT Month 2, and EXT Month 6, and were followed to EXT Month 7. Participants who who received 2 doses of GARDASIL™ in the Base Study were given 1 dose of GARDASIL™ at EXT Day 1 and were followed for 15 days (day of vaccination plus 14 days). In the 10-year Base Study Long-Term Follow-Up (LTFU) [V501-015-21] the effectiveness, immunogenicity and safety of GARDASIL™ was assessed during a period of 10 years following completion of the Base Study (V501-015) [14 years after the first dose of GARDASIL™] and, for some measures, the Base Study EXT (V501-015-10) [10 years after the first dose of GARDASIL™]. Participants from Denmark, Iceland, Norway and Sweden who participated in the Base Study were eligible to enroll in the LTFU. Effectiveness and safety was assessed by registry-based follow-up, and immunogenicity was assessed by serological testing at approximately Year 5 and Year 10 of the V501-015-21 LTFU. An 8-year extension was added to the LTFU (V501-015-22] to continue the evaluation of the long-term effectiveness and immunogenicity of GARDASIL™. Effectiveness and safety will be assessed by registry-based follow-up, and immunogenicity will be assessed by serological testing at approximately Year 4 and Year 8 of the extension of the LTFU.


Recruitment information / eligibility

Status Active, not recruiting
Enrollment 12167
Est. completion date March 3, 2025
Est. primary completion date July 31, 2007
Accepts healthy volunteers Accepts Healthy Volunteers
Gender Female
Age group 16 Years to 23 Years
Eligibility Inclusion Criteria for the Base Study: - Healthy women with an intact uterus with lifetime history of 0-4 sexual partners --For Extension Phase: - Participant received placebo or an incomplete vaccination series in the original study --For LTFU: - Participant was randomized into the Base Study from Denmark, Iceland, Norway, or Sweden. - Agreed to allow passive follow-up (retrospective review of registry data), analysis of biopsy specimens, future contact from National Registry Study Center and serum collection Exclusion Criteria for the Base Study: - Prior Human Papilloma Virus (HPV) vaccination - Prior abnormal Paps - Prior history of genital warts --For Extension Phase: - Prior complete HPV vaccination series - Subject lives in a country in which Gardasil is approved and is within the age range of the local labeling for Gardasil --For LTFU Study: - There were no exclusion criteria that did not overlap the inclusion criteria for this study.

Study Design


Related Conditions & MeSH terms


Intervention

Biological:
Gardasil, human papillomavirus (type 6, 11, 16, 18) recombinant vaccine
A 0.5 mL intramuscular injection in the deltoid muscle at Day 1, Month 2, and Month 6 in the Base Study.
Matching Placebo
A placebo 0.5 mL intramuscular injection in the deltoid muscle at Day 1, Month 2, and Month 6 in the Base Study.

Locations

Country Name City State
n/a

Sponsors (1)

Lead Sponsor Collaborator
Merck Sharp & Dohme LLC

References & Publications (18)

Ault KA; Future II Study Group. Effect of prophylactic human papillomavirus L1 virus-like-particle vaccine on risk of cervical intraepithelial neoplasia grade 2, grade 3, and adenocarcinoma in situ: a combined analysis of four randomised clinical trials. Lancet. 2007 Jun 2;369(9576):1861-1868. doi: 10.1016/S0140-6736(07)60852-6. — View Citation

Barr E, Gause CK, Bautista OM, Railkar RA, Lupinacci LC, Insinga RP, Sings HL, Haupt RM. Impact of a prophylactic quadrivalent human papillomavirus (types 6, 11, 16, 18) L1 virus-like particle vaccine in a sexually active population of North American women. Am J Obstet Gynecol. 2008 Mar;198(3):261.e1-11. doi: 10.1016/j.ajog.2007.09.001. — View Citation

FUTURE I/II Study Group, Dillner J, Kjaer SK, Wheeler CM, Sigurdsson K, Iversen OE, Hernandez-Avila M, Perez G, Brown DR, Koutsky LA, Tay EH, García P, Ault KA, Garland SM, Leodolter S, Olsson SE, Tang GW, Ferris DG, Paavonen J, Lehtinen M, Steben M, Bosch FX, Joura EA, Majewski S, Muñoz N, Myers ER, Villa LL, Taddeo FJ, Roberts C, Tadesse A, Bryan JT, Maansson R, Lu S, Vuocolo S, Hesley TM, Barr E, Haupt R. Four year efficacy of prophylactic human papillomavirus quadrivalent vaccine against low grade cervical, vulvar, and vaginal intraepithelial neoplasia and anogenital warts: randomised controlled trial. BMJ. 2010 Jul 20;341:c3493. doi: 10.1136/bmj.c3493. — View Citation

FUTURE II Study Group. Prophylactic efficacy of a quadrivalent human papillomavirus (HPV) vaccine in women with virological evidence of HPV infection. J Infect Dis. 2007 Nov 15;196(10):1438-46. Epub 2007 Oct 31. — View Citation

FUTURE II Study Group. Quadrivalent vaccine against human papillomavirus to prevent high-grade cervical lesions. N Engl J Med. 2007 May 10;356(19):1915-27. — View Citation

Garland SM, Insinga RP, Sings HL, Haupt RM, Joura EA. Human papillomavirus infections and vulvar disease development. Cancer Epidemiol Biomarkers Prev. 2009 Jun;18(6):1777-84. doi: 10.1158/1055-9965.EPI-09-0067. — View Citation

Garland SM, Steben M, Sings HL, James M, Lu S, Railkar R, Barr E, Haupt RM, Joura EA. Natural history of genital warts: analysis of the placebo arm of 2 randomized phase III trials of a quadrivalent human papillomavirus (types 6, 11, 16, and 18) vaccine. J Infect Dis. 2009 Mar 15;199(6):805-14. doi: 10.1086/597071. — View Citation

Giuliano AR, Lazcano-Ponce E, Villa L, Nolan T, Marchant C, Radley D, Golm G, McCarroll K, Yu J, Esser MT, Vuocolo SC, Barr E. Impact of baseline covariates on the immunogenicity of a quadrivalent (types 6, 11, 16, and 18) human papillomavirus virus-like-particle vaccine. J Infect Dis. 2007 Oct 15;196(8):1153-62. Epub 2007 Sep 17. — View Citation

Haupt RM, Wheeler CM, Brown DR, Garland SM, Ferris DG, Paavonen JA, Lehtinen MO, Steben M, Joura EA, Giacoletti KE, Radley DR, James MK, Saah AJ, Sings HL; FUTURE I and II Investigators. Impact of an HPV6/11/16/18 L1 virus-like particle vaccine on progression to cervical intraepithelial neoplasia in seropositive women with HPV16/18 infection. Int J Cancer. 2011 Dec 1;129(11):2632-42. doi: 10.1002/ijc.25940. Epub 2011 Apr 13. — View Citation

Joura EA, Leodolter S, Hernandez-Avila M, Wheeler CM, Perez G, Koutsky LA, Garland SM, Harper DM, Tang GW, Ferris DG, Steben M, Jones RW, Bryan J, Taddeo FJ, Bautista OM, Esser MT, Sings HL, Nelson M, Boslego JW, Sattler C, Barr E, Paavonen J. Efficacy of a quadrivalent prophylactic human papillomavirus (types 6, 11, 16, and 18) L1 virus-like-particle vaccine against high-grade vulval and vaginal lesions: a combined analysis of three randomised clinical trials. Lancet. 2007 May 19;369(9574):1693-702. — View Citation

Kjaer SK, Nygård M, Dillner J, Brooke Marshall J, Radley D, Li M, Munk C, Hansen BT, Sigurdardottir LG, Hortlund M, Tryggvadottir L, Joshi A, Das R, Saah AJ. A 12-Year Follow-up on the Long-Term Effectiveness of the Quadrivalent Human Papillomavirus Vacci — View Citation

Kjaer SK, Sigurdsson K, Iversen OE, Hernandez-Avila M, Wheeler CM, Perez G, Brown DR, Koutsky LA, Tay EH, García P, Ault KA, Garland SM, Leodolter S, Olsson SE, Tang GW, Ferris DG, Paavonen J, Lehtinen M, Steben M, Bosch FX, Dillner J, Joura EA, Majewski S, Muñoz N, Myers ER, Villa LL, Taddeo FJ, Roberts C, Tadesse A, Bryan J, Maansson R, Lu S, Vuocolo S, Hesley TM, Saah A, Barr E, Haupt RM. A pooled analysis of continued prophylactic efficacy of quadrivalent human papillomavirus (Types 6/11/16/18) vaccine against high-grade cervical and external genital lesions. Cancer Prev Res (Phila). 2009 Oct;2(10):868-78. doi: 10.1158/1940-6207.CAPR-09-0031. Epub 2009 Sep 29. — View Citation

Majewski S, Bosch FX, Dillner J, Iversen OE, Kjaer SK, Muñoz N, Olsson SE, Paavonen J, Sigurdsson K, Bryan J, Esser MT, Giacoletti K, James M, Taddeo F, Vuocolo S, Barr E. The impact of a quadrivalent human papillomavirus (types 6, 11, 16, 18) virus-like particle vaccine in European women aged 16 to 24. J Eur Acad Dermatol Venereol. 2009 Oct;23(10):1147-55. doi: 10.1111/j.1468-3083.2009.03266.x. Epub 2009 Apr 23. — View Citation

Nygård M, Saah A, Munk C, Tryggvadottir L, Enerly E, Hortlund M, Sigurdardottir LG, Vuocolo S, Kjaer SK, Dillner J. Evaluation of the Long-Term Anti-Human Papillomavirus 6 (HPV6), 11, 16, and 18 Immune Responses Generated by the Quadrivalent HPV Vaccine. Clin Vaccine Immunol. 2015 Aug;22(8):943-8. doi: 10.1128/CVI.00133-15. Epub 2015 Jun 17. — View Citation

Olsson SE, Kjaer SK, Sigurdsson K, Iversen OE, Hernandez-Avila M, Wheeler CM, Perez G, Brown DR, Koutsky LA, Tay EH, García P, Ault KA, Garland SM, Leodolter S, Tang GW, Ferris DG, Paavonen J, Lehtinen M, Steben M, Bosch FX, Dillner J, Joura EA, Majewski S, Muñoz N, Myers ER, Villa LL, Taddeo FJ, Roberts C, Tadesse A, Bryan J, Maansson R, Vuocolo S, Hesley TM, Saah A, Barr E, Haupt RM. Evaluation of quadrivalent HPV 6/11/16/18 vaccine efficacy against cervical and anogenital disease in subjects with serological evidence of prior vaccine type HPV infection. Hum Vaccin. 2009 Oct;5(10):696-704. Epub 2009 Oct 1. — View Citation

Perez G, Lazcano-Ponce E, Hernandez-Avila M, García PJ, Muñoz N, Villa LL, Bryan J, Taddeo FJ, Lu S, Esser MT, Vuocolo S, Sattler C, Barr E. Safety, immunogenicity, and efficacy of quadrivalent human papillomavirus (types 6, 11, 16, 18) L1 virus-like-particle vaccine in Latin American women. Int J Cancer. 2008 Mar 15;122(6):1311-8. — View Citation

Skjeldestad FE, Mehta V, Sings HL, Øvreness T, Turpin J, Su L, Boerckel P, Roberts C, Bryan J, Jansen KU, Esser MT, Liaw KL. Seroprevalence and genital DNA prevalence of HPV types 6, 11, 16 and 18 in a cohort of young Norwegian women: study design and cohort characteristics. Acta Obstet Gynecol Scand. 2008;87(1):81-8. — View Citation

Tay EH, Garland S, Tang G, Nolan T, Huang LM, Orloski L, Lu S, Barr E. Clinical trial experience with prophylactic HPV 6/11/16/18 VLP vaccine in young women from the Asia-Pacific region. Int J Gynaecol Obstet. 2008 Sep;102(3):275-83. doi: 10.1016/j.ijgo.2008.03.021. Epub 2008 Jun 16. — View Citation

* Note: There are 18 references in allClick here to view all references

Outcome

Type Measure Description Time frame Safety issue
Primary Incidence of the Composite Endpoint of Human Papillomavirus (HPV) 16/18-related Cervical Intraepithelial Neoplasia (CIN) 2 or Worse in the Base Study This measure is defined to have occurred when, on a single cervical biopsy, endocervical curettage (ECC), loop electrosurgical excision procedure (LEEP), or conization specimen, there was HPV Vaccine consensus diagnosis of CIN 2 or worse up to 4 years after the first vaccination. For this measure, CIN 2 or worse includes CIN 2, CIN 3, adenocarcinoma in situ (AIS) or cervical cancer related to HPV 16 or 18. Up to 4 years
Primary Incidence of the Composite Endpoint of Human Papillomavirus (HPV) 16/18-related Cervical Intraepithelial Neoplasia (CIN) 2 or Worse in the Long-term Follow-up (LTFU) Study This measure is defined to have occurred when, on a single cervical biopsy, endocervical curettage (ECC), loop electrosurgical excision procedure (LEEP), or conization specimen, there was HPV Vaccine Nordic pathology panel (NPP) consensus diagnosis of CIN 2 or worse up to 14 years after the first vaccination. For this measure, CIN 2 or worse includes CIN 2, CIN 3, AIS or cervical cancer related to HPV 16 or 18. Only participants who received qHPV vaccine during the Base Study vaccination period and consented for inclusion in the LTFU are included. Because the objective was to demonstrate qHPV vaccine prophylactic efficacy at 14 years, Cohort 2 was not included in the analysis. Up to 14 years since Vaccine Dose 1
Primary Incidence of the Composite Endpoint of HPV16/18-related CIN 2 or Worse in the Long-term Follow-up (LTFU) Study This measure is defined to have occurred when, on a single cervical biopsy, ECC, LEEP, or conization specimen, there was HPV Vaccine NPP consensus diagnosis of CIN 2 or worse up to 22 years after the first vaccination. For this measure, CIN 2 or worse includes CIN 2, CIN 3, AIS or cervical cancer related to HPV 16 or 18. Only participants who received qHPV vaccine during the Base Study vaccination period and consented for inclusion in the LTFU will be included. up to 22 years post Vaccination Dose 1
Secondary Number of Participants With Anti-Human Papillomavirus (HPV) 6 Titer =20 mMU/mL Based on Competitive Luminex Immunoassay (cLIA) in the Base Study Anti-HPV levels >20 mMU/mL neutralize a large input load of HPV 6 pseudovirions in vitro; thus, the number of participants with anti-HPV 6 =20 mMU/mL 4 four weeks after the third quadrivalent HPV (qHPV) or placebo vaccination in the Base Study was determined. Month 7 (4 weeks after Vaccination 3)
Secondary Number of Participants With Anti-Human Papillomavirus (HPV) 11 Titer =16 mMU/mL Based on Competitive Luminex Immunoassay (cLIA) in the Base Study Anti-HPV levels >20 mMU/mL neutralize a large input load of HPV 11 virions in vitro; thus, the number of participants with anti-HPV 11 =16 mMU/mL 4 four weeks after the third quadrivalent HPV (qHPV) or placebo vaccination in the Base Study was determined. Week 4 Postdose 3
Secondary Number of Participants With Anti-Human Papillomavirus (HPV) 16 Titer =20 mMU/mL Based on Competitive Luminex Immunoassay (cLIA) in the Base Study Anti-HPV levels >20 mMU/mL neutralize a large input load of HPV 16 pseudovirions in vitro; thus, the number of participants with anti-HPV 16 =20 mMU/mL 4 four weeks after the third quadrivalent HPV (qHPV) or placebo vaccination in the Base Study was determined. Week 4 Postdose 3
Secondary Number of Participants With Anti-Human Papillomavirus (HPV) 18 Titer =24 mMU/mL Based on Competitive Luminex Immunoassay (cLIA) in the Base Study Anti-HPV levels >20 mMU/mL neutralize a large input load of HPV 18 pseudovirions in vitro; thus, the number of participants with anti-HPV 18 =24 mMU/mL 4 four weeks after the third quadrivalent HPV (qHPV) or placebo vaccination in the Base Study was determined. Week 4 Postdose 3
Secondary Incidence of the Composite Endpoint of Human Papillomavirus (HPV) 31/33/35/39/45/51/52/56/58/59-related Cervical Intraepithelial Neoplasia (CIN) Grade 2 or Worse in the Long-term Follow-up (LTFU) Study This measure is defined to have occurred when, on a single cervical biopsy, endocervical curettage (ECC), loop electrosurgical excision procedure (LEEP), or conization specimen, there was HPV Vaccine Nordic pathology panel (NPP) consensus diagnosis of CIN 2 or worse related to nonvaccine HPV types up to 14 years after the first vaccination. For this measure, CIN 2 or worse includes CIN 2, CIN 3, AIS or cervical cancer related to nonvaccine HPV types 31, 33, 35, 39, 45, 51, 52, 56, 58, or 59. Only participants who received qHPV vaccine during the Base Study vaccination period and consented for inclusion in the LTFU are included. Because the objective was to demonstrate qHPV vaccine prophylactic efficacy at 14 years, Cohort 2 was not included in the analysis. Up to 14 years since Vaccination Dose 1
Secondary Incidence of the Composite Endpoint of HPV 6/11/16/18-related CIN (Any Grade), AIS, Cervical Cancer, Vulvar Cancer or Vaginal Cancer the Long-term Follow-up (LTFU) Study This measure was defined to have occurred if on a single biopsy or excised tissue, there was the NPP consensus diagnosis of CIN 1, CIN 2, CIN 3, AIS, cervical cancer, vulvar cancer or vaginal cancer AND at least 1 of HPV types 6, 11, 16 or 18 was detected by Thin-section PCR in an adjacent section from the same tissue block. Only participants who received qHPV vaccine during the Base Study vaccination period and consented for inclusion in the LTFU are included. Because the objective was to demonstrate qHPV vaccine prophylactic efficacy at 14 years, Cohort 2 was not included in the analysis. Up to 14 years since Vaccination Dose 1
Secondary Incidence of the Composite Endpoint of HPV 6/11/16/18-related CIN (Any Grade), AIS, Cervical Cancer, Vulvar Cancer or Vaginal Cancer the Long-term Follow-up (LTFU) Study This measure is defined to have occurred if on a single biopsy or excised tissue, there is the NPP consensus diagnosis of CIN 1, CIN 2, CIN 3, AIS, cervical cancer, vulvar cancer or vaginal cancer AND at least 1 of HPV types 6, 11, 16 or 18 is detected by Thin-section PCR in an adjacent section from the same tissue block. up to 22 years since Vaccination Dose 1
Secondary Geometric Mean Titers (GMTs) to HPV Types 6, 11, 16, and 18 at Month 108 Assessed by Competitive Luminex Immunoassay (cLIA) in the Long-Term Follow-Up (LTFU) Study Antibodies to human papillomavirus (HPV) types were measured using cLIA. Because the objective was to demonstrate antibody persistence at 14 years following vaccination in susceptible individuals, Cohort 2 was not included in the analysis. At 108 months since Vaccination Dose 1
Secondary Geometric Mean Titers (GMTs) to HPV Types 6, 11, 16, and 18 at Month 168 Assessed by Competitive Luminex Immunoassay (cLIA) in the Long-Term Follow-Up (LTFU) Study Antibodies to human papillomavirus (HPV) types were measured using cLIA. Because the objective was to demonstrate antibody persistence at 14 years following vaccination in susceptible individuals, Cohort 2 was not included in the analysis. At 168 months since Vaccination Dose 1
Secondary Percentage of Participants With Seropositivity to HPV Types 6, 11, 16, and 18 at Month 108 Assessed by Competitive Luminex Immunoassay (cLIA) in the Long-Term Follow-Up (LTFU) Study Antibodies to human papillomavirus (HPV) types were measured using cLIA. Seropositivity was assessed by competitive Luminex Immunoassay (cLIA); the serostatus cut-offs for anti-HPV 6, 11, 16 and 18 serum cLIA were 20, 16, 20 and 24 milliMerck units (mMU)/mL, respectively. Because the objective was to demonstrate antibody persistence at 14 years following vaccination in susceptible individuals, Cohort 2 was not included in the analysis. At 108 months since Vaccination Dose 1
Secondary Percentage of Participants With Seropositivity to HPV Types 6, 11, 16, and 18 at Month 168 Assessed by Competitive Luminex Immunoassay (cLIA) in the Long-Term Follow-Up (LTFU) Study Antibodies to human papillomavirus (HPV) types were measured using cLIA. Seropositivity was assessed by cLIA; the serostatus cut-offs for anti-HPV 6, 11, 16 and 18 serum cLIA were 20, 16, 20 and 24 milliMerck units (mMU)/mL, respectively. Because the objective was to demonstrate antibody persistence at 14 years following vaccination in susceptible individuals, Cohort 2 was not included in the analysis. At 168 months since Vaccination Dose 1
Secondary Geometric Mean Titers (GMTs) to HPV Types 6, 11, 16, and 18 at Month 108 Assessed by Immunoglobulin G Luminex Immunoassay (IgG LIA) in the Long-Term Follow-Up (LTFU) Study Antibodies to human papillomavirus (HPV) types were measured using IgG LIA. Because the objective was to demonstrate antibody persistence at 14 years following vaccination in susceptible individuals, Cohort 2 was not included in the analysis. At 108 months since Vaccination Dose 1
Secondary Geometric Mean Titers (GMTs) to HPV Types 6, 11, 16, and 18 at Month 168 Assessed by Immunoglobulin G Luminex Immunoassay (IgG LIA) in the Long-Term Follow-Up (LTFU) Study Antibodies to human papillomavirus (HPV) types were measured using IgG LIA. Because the objective was to demonstrate antibody persistence at 14 years following vaccination in susceptible individuals, Cohort 2 was not included in the analysis. At 168 months since Vaccination Dose 1
Secondary Percentage of Participants With Seropositivity to HPV Types 6, 11, 16, and 18 at Month 108 Assessed by Immunoglobulin G Luminex Immunoassay (IgG LIA) in the Long-Term Follow-Up (LTFU) Study Antibodies to HPV types were measured using anti-HPV IgG LIA. The serostatus cut-offs for IgG LIA anti-HPV 6, 11, 16 and 18 at Month 108 were 15, 15, 7, and 10 milliMerck units (mMU)/mL, respectively. Because the objective was to demonstrate antibody persistence at 14 years following vaccination in susceptible individuals, Cohort 2 was not included in the analysis. At 108 months since Vaccination Dose 1
Secondary Percentage of Participants With Seropositivity to HPV Types 6, 11, 16, and 18 at Month 168 Assessed by Immunoglobulin G Luminex Immunoassay (IgG LIA) in the Long-Term Follow-Up (LTFU) Study Antibodies to HPV types were measured using anti-HPV IgG LIA. The serostatus cut-offs for IgG LIA anti-HPV 6, 11, 16 and 18 at Month 168 were 9, 6, 5, and 5 milliMerck units (mMU)/mL, respectively. Because the objective was to demonstrate antibody persistence at 14 years following vaccination in susceptible individuals, Cohort 2 was not included in the analysis. At 168 months since Vaccination Dose 1
Secondary Geometric Mean Titers (GMTs) to HPV Types 6, 11, 16, and 18 at Month 216 Assessed by Immunoglobulin G Luminex Immunoassay (IgG LIA) in the Long-Term Follow-Up (LTFU) Study Antibodies to human papillomavirus (HPV) types will be measured using IgG LIA.. At 216 months since Vaccination Dose 1
Secondary Percentage of Participants With Seropositivity to HPV Types 6, 11, 16, and 18 at Month 216 Assessed by Immunoglobulin G Luminex Immunoassay (IgG LIA) ) in the Long-Term Follow-Up (LTFU) Study Antibodies to HPV types will be measured using anti-HPV IgG LIA. The serostatus cut-offs for IgG LIA anti-HPV 6, 11, 16 and 18 are 15, 15, 7, and 10 milliMerck units (mMU)/mL, respectively. The percentage of participants that are seropositive for each type will be summarized. At 216 months since Vaccination Dose 1
Secondary Geometric Mean Titers (GMTs) to HPV Types 6, 11, 16, and 18 at Month 264 Assessed by Immunoglobulin G Luminex Immunoassay (IgG LIA) in the Long-Term Follow-Up (LTFU) Study Antibodies to human papillomavirus (HPV) types will be measured using IgG LIA.. At 264 months since Vaccination Dose 1
Secondary Percentage of Participants With Seropositivity to HPV Types 6, 11, 16, and 18 at Month 264 Assessed by Immunoglobulin G Luminex Immunoassay (IgG LIA) in the Long-Term Follow-Up (LTFU) Study Antibodies to HPV types will be measured using anti-HPV IgG LIA. The serostatus cut-offs for IgG LIA anti-HPV 6, 11, 16 and 18 are 15, 15, 7, and 10 milliMerck units (mMU)/mL, respectively. The percentage of participants that are seropositive for each type will be summarized. At 264 months since Vaccination Dose 1
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