Single Dose of Cervarix Vaccine in Girls or Three Doses of Gardasil Vaccine in Women for the Prevention of Human Papillomavirus Infection, the PRIMAVERA-ESCUDDO Trial

NCT ID: NCT03728881

Last Updated: 2025-08-03

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: PHASE3
• Total Enrollment: 1240 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2019-04-01
• Study Completion Date: 2024-04-23

Brief Summary

This phase IIIb trial compares a single dose of the Cervarix vaccine in girls to 3 doses of the Gardasil vaccine in young women for the prevention of human papillomavirus (HPV) infection. Cervarix is a vaccine used to prevent cervical cancer caused by HPV types 16 and 18. Gardasil is vaccine used to prevent cervical, vulvar, and vaginal cancer caused by HPV types 16 and 18 and genital warts caused by HPV types 6 and 11. Giving only one dose of the Cervarix vaccine in girls may work the same as 3 doses of the Gardasil vaccine in young women in preventing HPV infection and ultimately, cervical and other HPV-related cancers. Currently, many women around the world cannot get HPV vaccines because they are too expensive. If this trial can show one dose given to young girls is enough to prevent cancer, more girls might be able to get the vaccine.

Detailed Description

PRIMARY OBJECTIVE:

I. To demonstrate that the immunogenicity (as determined by enzyme-linked immunosorbent assay [ELISA]) of a single dose of recombinant human papillomavirus bivalent vaccine (Cervarix) in 9-14 year old girls is non-inferior to the immunogenicity of three doses of quadrivalent human papillomavirus (types 6, 11, 16, 18) recombinant vaccine (Gardasil), administered at 0, 2, and 6 months, in 18-25 year old women 36 months after initial vaccination, with an interim analysis at 24 months after initial vaccination.

SECONDARY OBJECTIVES:

I. To compare the distribution of HPV -16 and HPV-18 antibodies levels, assessed at 24 and 36 months after initial vaccination, following a single dose of Cervarix in 9-14 year old girls and three doses of Gardasil, administered at 0, 2, and 6 months, in 18-25 year old women.

II. To compare rates of seroconversion based on HPV-16 and HPV-18 antibody levels, assessed at 24 and 36 months after initial vaccination, following a single dose of Cervarix in 9-14 year old girls and three doses of Gardasil, administered at 0, 2, and 6 months, in 18-25 year old women.

III. To compare geometric mean titers (GMTs), distributions, and seroconversion rates for HPV-16 and HPV-18 antibodies, assessed at 24 and 36 months after initial vaccination, following a single dose of Cervarix in 9-11 year old girls and three doses of Gardasil, administered at 0, 2, and 6 months, in 18-25 year old women; to perform a similar comparison restricting to 12-14 year old girls.

IV. To compare GMTs, distributions, and seroconversion rates for HPV-16 and HPV-18 antibodies, assessed at 1-month after vaccination and 1-year after vaccination, following a single dose of Cervarix in 9-10 year old girls and a single dose of Cervarix in 11-14 year old girls.

V. To evaluate whether baseline variables (e.g. geographic district, initial antibody levels, date of vaccination) are associated with GMTs, distributions, and seroconversion rates for HPV16 and HPV-18 antibodies, assessed at 24 and 36 months after initial vaccination.

OUTLINE: Participants are assigned to 1 of 2 groups.

GROUP I: Participants 9-14 years old receive Cervarix intramuscularly (IM) at baseline.

GROUP II: Participants 18-25 years old receive Gardasil IM at baseline and at 2 and 6 months in the absence of unacceptable toxicity.

After completion of trial vaccine dose(s), participants are followed up at 1, 12, 24, and 36 months.

Conditions

Human Papillomavirus-Related Cervical Carcinoma

Study Design

• Allocation Method: NON_RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: PREVENTION
• Blinding Strategy: NONE

Study Groups

Girls (1D Cervarix®)

Participants 9-14 years old receive Cervarix IM at baseline.

Group Type: EXPERIMENTAL

Recombinant Human Papillomavirus Bivalent Vaccine

Intervention Type: BIOLOGICAL

Given IM

Women (3D Gardasil-4®)

Participants 18-25 years old receive Gardasil IM at baseline and at 2 and 6 months in the absence of unacceptable toxicity.

Group Type: ACTIVE_COMPARATOR

Quadrivalent Human Papillomavirus (types 6, 11, 16, 18) Recombinant Vaccine

Intervention Type: BIOLOGICAL

Given IM

Interventions

Quadrivalent Human Papillomavirus (types 6, 11, 16, 18) Recombinant Vaccine

Given IM

Intervention Type: BIOLOGICAL

Recombinant Human Papillomavirus Bivalent Vaccine

Given IM

Intervention Type: BIOLOGICAL

Other Intervention Names

Gardasil; Quadrivalent HPV [Type 6, 11, 16 and 18] L1 Virus-Like Particle vaccine; quadrivalent human papillomavirus (types 6, 11, 16, and 18) recombinant vaccine; Recombinant Human Papillomavirus (HPV) Quadrivalent Vaccine; V501; Cervarix; GSK-580299; HPV 16/18 L1 VLP/AS04 VAC; HPV-16/18 VLP/AS04 Vaccine; Human Papillomavirus 16/18 L1 Virus-Like Particle/AS04 Vaccine; Human Papillomavirus Bivalent Types 16 and 18 Vaccine, Recombinant; Human Papillomavirus Vaccine L1 16,18; Human Papillomavirus Vaccine, L1 Type 16, 18; Recombinant HPV Bivalent Vaccine

Eligibility Criteria

Inclusion Criteria

• Aged between:

• 9 and 14 years inclusive for Cervarix group
• 18 and 25 years inclusive for Gardasil group
• Living in the study area without plans to move outside the country in the next six months
• Able to communicate with study personnel
• Able and willing to provide a blood sample
• Willing to permit export of blood samples to the United States
• Willing to participate in the study and:

• If Cervarix group and less than 12 years old, receive study information and be supported in study participation by at least one of parent (or guardian), who is willing to sign the informed consent document
• If Cervarix group and 12 years old or older, sign the informed assent and be supported in study participation by at least one parent (or guardian), who is willing to sign the informed consent document
• If Gardasil group, sign the informed consent
• In good health as determined by a medical history (physical exam will be conducted if necessary per the doctor's criterion)

Exclusion Criteria

• They have a diagnosis of an autoimmune, degenerative, or neurological disease without treatment or adequate control; a progressive or severe neurological disease; a genetic immunodeficiency; or any other serious chronic disease without treatment and / or adequate control that, according to the principal investigator or designee, for which vaccination is contraindicated (NOTE: Potential participants with these conditions can be included after consultation with the external medical advisor of the study or with an appropriate specialist)
• They are allergic to one of the vaccine components, including yeast (if Gardasil group)
• They have received immunoglobulins within 90 days preceding enrollment/vaccination visit
• They are unwilling to provide a blood sample
• Unwilling to permit export of blood samples to the United States
• They have a positive urine pregnancy test result
• They are pregnant
• They are planning to become pregnant
• The clinician determining eligibility in agreement with the principal investigator considers that there is a reason that precludes participation
• They have been vaccinated against HPV
• The participant or her parent/legal guardian, as applicable, does not have an identification document

• Minimum Eligible Age: 9 Years
• Maximum Eligible Age: 25 Years
• Eligible Sex: FEMALE
• Accepts Healthy Volunteers: Yes

Sponsors

Cancer Research UK

OTHER

Sponsor Role: collaborator

Bill and Melinda Gates Foundation

OTHER

Sponsor Role: collaborator

National Cancer Institute (NCI)

NIH

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

Aimee R Kreimer

Role: PRINCIPAL_INVESTIGATOR

National Cancer Institute (NCI)

Locations

Agencia Costarricense de Investigaciones Biomédicas (ACIB)

Liberia, Guanacaste Province, Costa Rica

Countries

Costa Rica

References

Cortes B, Ocampo R, Porras C, Liu D, Gail MH, Sierra MS, Herrero R, Lowy DR, Carvajal LJ, Kemp TJ, Fantin R, Schussler J, Hildesheim A, Sampson JN, Pinto LA, Schiller JT, Kreimer AR. Human papillomavirus (HPV) type 16 and type 18 antibody concentrations after a single dose of bivalent HPV vaccine in girls aged 9-14 years compared with three doses of quadrivalent HPV vaccine in women aged 18-25 years in Costa Rica (PRIMAVERA): a non-randomised, open-label, immunobridging, non-inferiority trial. Lancet Infect Dis. 2025 Jul 16:S1473-3099(25)00284-1. doi: 10.1016/S1473-3099(25)00284-1. Online ahead of print.

Reference Type: BACKGROUND

PMID: 40683285 (View on PubMed)

Provided Documents

Document Type: Study Protocol

View Document

Document Type: Statistical Analysis Plan

View Document

Other Identifiers

NCI-2020-07432

Identifier Type: REGISTRY

Identifier Source: secondary_id

19-C-N009

Identifier Type: OTHER

Identifier Source: secondary_id

NCI-2020-07432

Identifier Type: -

Identifier Source: org_study_id