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Extended Follow-up of Women Who Received One, Two, and Three Doses of the HPV Vaccine in the Costa Rica Vaccine Trial (CVT), ESCUDDO-CVT Study

Human Papillomavirus Infection Clinical Trial

Official title:
Long-Term Immunologic Follow-Up of Women Who Received One, Two, and Three Doses of the Bivalent HPV Vaccine in the Costa Rica HPV-16/18 Vaccine Trial (CVT): Generating Durability Data: The ESCUDDO-CVT Study

Clinical Trial Summary

This study is extending follow up of women who participated in the Costa Rica Vaccine Trial (CVT) and received one dose or two doses of the human papillomavirus (HPV) vaccine, along with a group of women who received three doses. It also studies the stability of HPV defenses in these groups of women for up to 20 years after initial vaccination. Studying samples of blood in the laboratory may provide information on how long one, two, and three doses of the vaccine provide protection against HPV. The results of this study may also help researchers learn whether one dose of HPV vaccine is enough to protect against HPV.

Clinical Trial Description

PRIMARY OBJECTIVES: I. Estimate the change in antibody levels between years 11 and 20. II. Estimate the proportion of individuals who become seronegative (i.e.: serorevert) between years 11 and 20. SECONDARY OBJECTIVES: I. Assess the prevalence and distribution of type-specific HPV infections at least 18 years after HPV vaccination. II. Assess the number and type of premalignant lesions present at least 18 years after vaccination. III. For each dose regimen, characterize HPV-specific memory B cells and long-lived plasma cells present at least 18 years after HPV vaccination, and compare these characteristics with results from earlier time points. OUTLINE: This is an observational study. Patients complete a short questionnaire regarding risk factors for HPV infection and undergo collection of blood samples for testing HPV16 and HPV18 levels on study. ;

Study Design

Related Conditions & MeSH terms

Clinical Trial Details
NCT number NCT03309033
Study type Observational
Source National Cancer Institute (NCI)
Contact
Status Active, not recruiting
Phase
Start date July 2, 2018
Completion date February 28, 2026
View Details
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