Single Dose of Cervarix Vaccine in Girls or Three Doses of Gardasil Vaccine in Women for the Prev… (NCT03728881) | Clinical Trial Compass
CompletedPhase 3
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
Costa Rica1,240 participantsStarted 2019-04-01
Plain-language 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.
Who can participate
Age range
9 Years – 25 Years
Sex
FEMALE
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
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 wit…
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
What they're measuring
1
Number Seropositive for HPV16 at 36 Months
Timeframe: 36 months following initial HPV vaccination
2
Immunogenicity for HPV16 of One Dose of Bivalent HPV Vaccine (Cervarix) in 9-14 Year Old Girls Compared to Three Doses of Quadrivalent HPV Vaccine (Gardasil), Administered at 0,2 and 6 Months, in 18-25 Year Old Women, 36 Months After Initial Vaccination
Timeframe: 36 months following initial vaccination
3
Number Seropositive for HPV18 at 36 Months
Timeframe: 36 months following initial vaccination
4
Immunogenicity for HPV18 of One Dose of Bivalent HPV Vaccine (Cervarix) in 9-14 Year Old Girls Compared to Three Doses of Quadrivalent HPV Vaccine (Gardasil), Administered at 0,2, and 6 Months, in 18-25 Year Old Women, 36 Months After Initial Vaccination
Timeframe: 36 months following initial vaccination
5
Number Seropositive for HPV16 at 24 Months
Timeframe: 24 months following initial HPV vaccination
6
Immunogenicity for HPV16 of One Dose of Bivalent HPV Vaccine (Cervarix) in 9-14 Year Old Girls Compared to Three Doses of Quadrivalent HPV Vaccine (Gardasil), Administered at 0,2, and 6 Months, in 18-25 Year Old Women, 24 Months After Initial Vaccination
Timeframe: 24 months following initial vaccination
7
Number Seropositive for HPV18 at 24 Months
Timeframe: 24 months following initial vaccination
8
Immunogenicity for HPV18 of One Dose of Bivalent HPV Vaccine (Cervarix) in 9-14 Year Old Girls Compared to Three Doses of Quadrivalent HPV Vaccine (Gardasil), Administered at 0,2, and 6 Months, in 18-25 Year Old Women, 24 Months After Initial Vaccination
Timeframe: 24 months following initial vaccination